diff --git a/src/invisible_playwright/_fpforge/_sampler.py b/src/invisible_playwright/_fpforge/_sampler.py
index b3d7048..b977ba5 100644
--- a/src/invisible_playwright/_fpforge/_sampler.py
+++ b/src/invisible_playwright/_fpforge/_sampler.py
@@ -257,41 +257,31 @@ _NETWORK = Network([
 
 
 # ═══════════════════════════════════════════════════════════════════════
-#  FONT WHITELIST (Bayesian: core ∪ sampled_optional | gpu_class)
+#  FONT LIST (Bayesian: core ∪ sampled_optional | gpu_class)
 # ═══════════════════════════════════════════════════════════════════════
-# Semantic flip: previously exclude-list (block N probed fonts per seed).
-# Now whitelist (browser sees ONLY these fonts, everything else hidden).
+# The browser sees ONLY these families (everything else hidden) and renders
+# them from the REAL Windows font files the binary bundles in <GRE>/fonts
+# (MOZ_BUNDLED_FONTS). No fabricated widths: per-session metric uniqueness
+# comes from the HarfBuzz per-glyph jitter (shared fpp.hw_seed), not here.
 # Core (~112): always included — fresh Win11 + Office 2021 English.
-# Optional (~40): sampled per-session with P(present | gpu_class). Gives
-# small realistic variance (~3-8 optional fonts differ per session) while
-# keeping the profile strongly centered on 'typical Windows user'.
+# Optional (~40): one realistic Windows profile sampled per seed (weighted,
+# deterministic) → ~3-8 optional families differ per session while staying
+# centered on 'typical Windows user'.
 
 
 def derive_font_prefs(gpu_class: str, rng) -> Dict[str, str]:
-    """Build COHERENT whitelist + metrics strings for the session.
+    """Build the session's font family list.
 
     Profile-based (not per-font random):
-      - Core fonts always included (OS defaults + CSS-generic backers).
-      - Optional fonts come from ONE realistic Windows profile picked per seed
-        (weighted, deterministic). Metrics carry REAL per-family widths.
+      - Core families always included (OS defaults + CSS-generic backers).
+      - Optional families come from ONE realistic Windows profile picked per
+        seed (weighted, deterministic).
 
-    Returns:
-      {
-        "whitelist": "arial,calibri,marlett,...",
-        "metrics":   "arial|0.978,calibri|0.934,marlett|0.855,..."
-      }
-
-    The whitelist is the list of font families to advertise. The metrics
-    string encodes per-family width scale factors that the consumer can
-    use to make each family detectable by width-diff font probes.
-
-    Each entry in font_pool.json carries its own {name, factor} pair so the
-    two pref strings are GUARANTEED coherent — no chance of a fabricated
-    font with factor 1.0 (undetectable) or a metrics entry for a font not
-    in the whitelist (useless).
-
-    Markers & add-new-font: simply add an entry to font_pool.json:core (with
-    a factor at least 4% away from 1.0) — no special-case code needed.
+    Returns ``{"whitelist": "arial,calibri,marlett,..."}`` — the comma-joined
+    family list to advertise. The binary applies it to the native system font
+    allow-list AT CONSTRUCTION and renders each family from the bundled real
+    Windows file, so glyphs and widths are genuine. To add a family, just add
+    an entry to font_pool.json:core/optional — no special-case code needed.
     """
     # Profile-based (2026-06-18): pick ONE realistic Windows font profile (weighted,
     # deterministic per seed). Per-font random sampling is superseded — it produced
@@ -319,8 +309,8 @@ def derive_font_prefs(gpu_class: str, rng) -> Dict[str, str]:
     else:
         included.extend(_FONT_OPTIONAL)  # fallback (no profiles defined): all optional
     # Dedup by name (a profile may list a font that is also in core, e.g. after a
-    # standard font is promoted core→always-present) so the whitelist/metrics never
-    # carry a duplicate family.
+    # standard font is promoted core→always-present) so the list never carries a
+    # duplicate family.
     _seen: set = set()
     _uniq: list = []
     for e in included:
@@ -331,13 +321,7 @@ def derive_font_prefs(gpu_class: str, rng) -> Dict[str, str]:
     # Deterministic ordering: sort by name
     included.sort(key=lambda e: e["name"])
     whitelist = ",".join(e["name"] for e in included)
-    # Emit the UNIVERSAL real Windows width per font (host-independent value, same everywhere).
-    # prefs._font_metrics_for_platform divides by the per-platform collapse base to get the C++
-    # factor (measureText = base * factor = the exact Windows width on Windows/Linux/mac).
-    metrics = ",".join(
-        f'{e["name"]}|{e["width"]:.1f}' for e in included
-    )
-    return {"whitelist": whitelist, "metrics": metrics}
+    return {"whitelist": whitelist}
 
 
 # Back-compat shim: legacy callers still import derive_font_whitelist.
diff --git a/src/invisible_playwright/_fpforge/data/font_pool.json b/src/invisible_playwright/_fpforge/data/font_pool.json
index bfa4157..4104fba 100644
--- a/src/invisible_playwright/_fpforge/data/font_pool.json
+++ b/src/invisible_playwright/_fpforge/data/font_pool.json
@@ -1,723 +1,173 @@
 {
   "core": [
     {
-      "name": "arial",
-      "width": 2256.7
+      "name": "arial"
     },
     {
-      "name": "arial black",
-      "width": 2256.7
+      "name": "calibri"
     },
     {
-      "name": "arial narrow",
-      "width": 2216.7
+      "name": "cambria"
     },
     {
-      "name": "bahnschrift",
-      "width": 2231.9
+      "name": "cambria math"
     },
     {
-      "name": "bahnschrift condensed",
-      "width": 2216.7
+      "name": "candara"
     },
     {
-      "name": "bahnschrift light",
-      "width": 2216.7
+      "name": "comic sans ms"
     },
     {
-      "name": "bahnschrift light condensed",
-      "width": 2216.7
+      "name": "consolas"
     },
     {
-      "name": "bahnschrift light semicondensed",
-      "width": 2216.7
+      "name": "constantia"
     },
     {
-      "name": "bahnschrift semibold",
-      "width": 2216.7
+      "name": "corbel"
     },
     {
-      "name": "bahnschrift semibold condensed",
-      "width": 2216.7
+      "name": "courier new"
     },
     {
-      "name": "bahnschrift semibold semicondensed",
-      "width": 2216.7
+      "name": "ebrima"
     },
     {
-      "name": "bahnschrift semicondensed",
-      "width": 2216.7
+      "name": "franklin gothic"
     },
     {
-      "name": "bahnschrift semilight",
-      "width": 2216.7
+      "name": "gabriola"
     },
     {
-      "name": "bahnschrift semilight condensed",
-      "width": 2216.7
+      "name": "gadugi"
     },
     {
-      "name": "bahnschrift semilight semicondensed",
-      "width": 2216.7
+      "name": "georgia"
     },
     {
-      "name": "calibri",
-      "width": 2139.5
+      "name": "impact"
     },
     {
-      "name": "calibri light",
-      "width": 2139.5
+      "name": "javanese text"
     },
     {
-      "name": "cambria",
-      "width": 2258.2
+      "name": "lucida console"
     },
     {
-      "name": "cambria math",
-      "width": 2258.2
+      "name": "lucida sans unicode"
     },
     {
-      "name": "candara",
-      "width": 2187.8
+      "name": "ms gothic"
     },
     {
-      "name": "candara light",
-      "width": 2187.8
+      "name": "ms pgothic"
     },
     {
-      "name": "cascadia code",
-      "width": 2362.3
+      "name": "mv boli"
     },
     {
-      "name": "cascadia mono",
-      "width": 2362.3
+      "name": "malgun gothic"
     },
     {
-      "name": "comic sans ms",
-      "width": 2361.9
+      "name": "marlett"
     },
     {
-      "name": "consolas",
-      "width": 2216.7
+      "name": "microsoft himalaya"
     },
     {
-      "name": "constantia",
-      "width": 2283.2
+      "name": "microsoft jhenghei"
     },
     {
-      "name": "corbel",
-      "width": 2129.9
+      "name": "microsoft jhenghei ui"
     },
     {
-      "name": "corbel light",
-      "width": 2129.9
+      "name": "microsoft new tai lue"
     },
     {
-      "name": "courier new",
-      "width": 2419.2
+      "name": "microsoft phagspa"
     },
     {
-      "name": "ebrima",
-      "width": 2285.2
+      "name": "microsoft sans serif"
     },
     {
-      "name": "franklin gothic",
-      "width": 2225.4
+      "name": "microsoft yahei"
     },
     {
-      "name": "franklin gothic medium",
-      "width": 2225.4
+      "name": "microsoft yi baiti"
     },
     {
-      "name": "gabriola",
-      "width": 1598.5
+      "name": "mingliu-extb"
     },
     {
-      "name": "gadugi",
-      "width": 2285.2
+      "name": "mongolian baiti"
     },
     {
-      "name": "georgia",
-      "width": 2338.7
+      "name": "myanmar text"
     },
     {
-      "name": "hololens mdl2 assets",
-      "width": 2216.7
+      "name": "pmingliu-extb"
     },
     {
-      "name": "impact",
-      "width": 2060.8
+      "name": "palatino linotype"
     },
     {
-      "name": "ink free",
-      "width": 2122.5
+      "name": "segoe print"
     },
     {
-      "name": "javanese text",
-      "width": 2311.9
+      "name": "segoe script"
     },
     {
-      "name": "leelawadee ui semilight",
-      "width": 2283.4
+      "name": "segoe ui"
     },
     {
-      "name": "lucida console",
-      "width": 2429.5
+      "name": "segoe ui symbol"
     },
     {
-      "name": "lucida sans unicode",
-      "width": 2464.3
+      "name": "simsun"
     },
     {
-      "name": "malgun gothic",
-      "width": 2351.1
+      "name": "simsun-extb"
     },
     {
-      "name": "malgun gothic semilight",
-      "width": 2351.1
+      "name": "sitka small"
     },
     {
-      "name": "marlett",
-      "width": 3740.2
+      "name": "sylfaen"
     },
     {
-      "name": "microsoft himalaya",
-      "width": 1468.4
+      "name": "trebuchet ms"
     },
     {
-      "name": "microsoft jhenghei",
-      "width": 2440.4
+      "name": "verdana"
     },
     {
-      "name": "microsoft jhenghei light",
-      "width": 2440.4
+      "name": "webdings"
     },
     {
-      "name": "microsoft jhenghei ui",
-      "width": 2440.4
+      "name": "yu gothic"
     },
     {
-      "name": "microsoft jhenghei ui light",
-      "width": 2440.4
+      "name": "courier"
     },
     {
-      "name": "microsoft new tai lue",
-      "width": 2285.2
+      "name": "helvetica"
     },
     {
-      "name": "microsoft phagspa",
-      "width": 2285.2
-    },
-    {
-      "name": "microsoft sans serif",
-      "width": 2256.6
-    },
-    {
-      "name": "microsoft tai le",
-      "width": 2285.2
-    },
-    {
-      "name": "microsoft yahei",
-      "width": 2487.6
-    },
-    {
-      "name": "microsoft yahei light",
-      "width": 2487.6
-    },
-    {
-      "name": "microsoft yahei ui",
-      "width": 2487.6
-    },
-    {
-      "name": "microsoft yahei ui light",
-      "width": 2487.6
-    },
-    {
-      "name": "microsoft yi baiti",
-      "width": 1830.7
-    },
-    {
-      "name": "mingliu-extb",
-      "width": 2016
-    },
-    {
-      "name": "mingliu_hkscs-extb",
-      "width": 2016
-    },
-    {
-      "name": "mongolian baiti",
-      "width": 2191.7
-    },
-    {
-      "name": "ms gothic",
-      "width": 2016
-    },
-    {
-      "name": "ms pgothic",
-      "width": 2031.7
-    },
-    {
-      "name": "mv boli",
-      "width": 2417.4
-    },
-    {
-      "name": "myanmar text",
-      "width": 2285.2
-    },
-    {
-      "name": "nirmala ui",
-      "width": 2283.4
-    },
-    {
-      "name": "nirmala ui semilight",
-      "width": 2283.4
-    },
-    {
-      "name": "nsimsun",
-      "width": 2016
-    },
-    {
-      "name": "palatino linotype",
-      "width": 2358.6
-    },
-    {
-      "name": "pmingliu-extb",
-      "width": 2065.9
-    },
-    {
-      "name": "sans serif collection",
-      "width": 2361.6
-    },
-    {
-      "name": "segoe mdl2 assets",
-      "width": 2137.2
-    },
-    {
-      "name": "segoe print",
-      "width": 2675.2
-    },
-    {
-      "name": "segoe script",
-      "width": 2830.3
-    },
-    {
-      "name": "segoe ui",
-      "width": 2285.2
-    },
-    {
-      "name": "segoe ui black",
-      "width": 2285.2
-    },
-    {
-      "name": "segoe ui emoji",
-      "width": 2283.4
-    },
-    {
-      "name": "segoe ui historic",
-      "width": 2283.4
-    },
-    {
-      "name": "segoe ui semibold",
-      "width": 2216.7
-    },
-    {
-      "name": "segoe ui semilight",
-      "width": 2216.7
-    },
-    {
-      "name": "segoe ui symbol",
-      "width": 2283.4
-    },
-    {
-      "name": "segoe ui variable",
-      "width": 2216.7
-    },
-    {
-      "name": "simsun",
-      "width": 2016
-    },
-    {
-      "name": "simsun-extb",
-      "width": 2016
-    },
-    {
-      "name": "sitka banner",
-      "width": 2007.8
-    },
-    {
-      "name": "sitka display",
-      "width": 2007.8
-    },
-    {
-      "name": "sitka heading",
-      "width": 2007.8
-    },
-    {
-      "name": "sitka small",
-      "width": 2007.8
-    },
-    {
-      "name": "sitka subheading",
-      "width": 2007.8
-    },
-    {
-      "name": "sitka text",
-      "width": 2007.8
-    },
-    {
-      "name": "sylfaen",
-      "width": 2279.6
-    },
-    {
-      "name": "symbol",
-      "width": 2223.4
-    },
-    {
-      "name": "tahoma",
-      "width": 2233.1
-    },
-    {
-      "name": "times new roman",
-      "width": 2191.7
-    },
-    {
-      "name": "trebuchet ms",
-      "width": 2222.4
-    },
-    {
-      "name": "verdana",
-      "width": 2529.1
-    },
-    {
-      "name": "webdings",
-      "width": 3627.5
-    },
-    {
-      "name": "wingdings",
-      "width": 3539.7
-    },
-    {
-      "name": "wingdings 2",
-      "width": 3582.1
-    },
-    {
-      "name": "wingdings 3",
-      "width": 2963.4
-    },
-    {
-      "name": "yu gothic",
-      "width": 2351.3
-    },
-    {
-      "name": "yu gothic light",
-      "width": 2351.3
-    },
-    {
-      "name": "yu gothic medium",
-      "width": 2216.7
-    },
-    {
-      "name": "yu gothic ui",
-      "width": 2285.2
-    },
-    {
-      "name": "yu gothic ui light",
-      "width": 2285.2
-    },
-    {
-      "name": "yu gothic ui semibold",
-      "width": 2216.7
-    },
-    {
-      "name": "yu gothic ui semilight",
-      "width": 2216.7
-    }
-  ],
-  "optional": [
-    {
-      "name": "aparajita",
-      "width": 2216.7
-    },
-    {
-      "name": "arabic typesetting",
-      "width": 2216.7
-    },
-    {
-      "name": "arial unicode ms",
-      "width": 2216.7
-    },
-    {
-      "name": "batang",
-      "width": 2216.7
-    },
-    {
-      "name": "century",
-      "width": 2397.7
-    },
-    {
-      "name": "century gothic",
-      "width": 2409.1
-    },
-    {
-      "name": "dengxian",
-      "width": 2216.7
-    },
-    {
-      "name": "dfkai-sb",
-      "width": 2216.7
-    },
-    {
-      "name": "dokchampa",
-      "width": 2216.7
-    },
-    {
-      "name": "estrangelo edessa",
-      "width": 2216.7
-    },
-    {
-      "name": "euphemia",
-      "width": 2216.7
-    },
-    {
-      "name": "fangsong",
-      "width": 2216.7
-    },
-    {
-      "name": "gautami",
-      "width": 2216.7
-    },
-    {
-      "name": "haettenschweiler",
-      "width": 1567.6
-    },
-    {
-      "name": "helv",
-      "width": 2256.6
-    },
-    {
-      "name": "iskoola pota",
-      "width": 2216.7
-    },
-    {
-      "name": "kaiti",
-      "width": 2216.7
-    },
-    {
-      "name": "kalinga",
-      "width": 2216.7
-    },
-    {
-      "name": "kartika",
-      "width": 2216.7
-    },
-    {
-      "name": "khmer ui",
-      "width": 2216.7
-    },
-    {
-      "name": "kokila",
-      "width": 2216.7
-    },
-    {
-      "name": "lao ui",
-      "width": 2216.7
-    },
-    {
-      "name": "latha",
-      "width": 2216.7
-    },
-    {
-      "name": "leelawadee",
-      "width": 2267.4
-    },
-    {
-      "name": "leelawadee ui",
-      "width": 2283.4
-    },
-    {
-      "name": "levenim mt",
-      "width": 2216.7
-    },
-    {
-      "name": "mangal",
-      "width": 2216.7
-    },
-    {
-      "name": "meiryo",
-      "width": 2216.7
-    },
-    {
-      "name": "meiryo ui",
-      "width": 2216.7
-    },
-    {
-      "name": "microsoft uighur",
-      "width": 1498.1
-    },
-    {
-      "name": "monotype corsiva",
-      "width": 1929.3
-    },
-    {
-      "name": "ms mincho",
-      "width": 2216.7
-    },
-    {
-      "name": "ms outlook",
-      "width": 2361.9
-    },
-    {
-      "name": "ms pmincho",
-      "width": 2216.7
-    },
-    {
-      "name": "ms reference sans serif",
-      "width": 2529.0
-    },
-    {
-      "name": "ms reference specialty",
-      "width": 2976.2
-    },
-    {
-      "name": "ms ui gothic",
-      "width": 2031.7
-    },
-    {
-      "name": "mt extra",
-      "width": 2183.8
-    },
-    {
-      "name": "nyala",
-      "width": 2216.7
-    },
-    {
-      "name": "plantagenet cherokee",
-      "width": 2216.7
-    },
-    {
-      "name": "pmingliu",
-      "width": 2216.7
-    },
-    {
-      "name": "pristina",
-      "width": 1829.1
-    },
-    {
-      "name": "raavi",
-      "width": 2216.7
-    },
-    {
-      "name": "segoe fluent icons",
-      "width": 2142.7
-    },
-    {
-      "name": "segoe ui light",
-      "width": 2216.7
-    },
-    {
-      "name": "shonar bangla",
-      "width": 2216.7
-    },
-    {
-      "name": "shruti",
-      "width": 2216.7
-    },
-    {
-      "name": "simhei",
-      "width": 2216.7
-    },
-    {
-      "name": "simkai",
-      "width": 2216.7
-    },
-    {
-      "name": "small fonts",
-      "width": 2256.7
-    },
-    {
-      "name": "traditional arabic",
-      "width": 2216.7
-    },
-    {
-      "name": "tunga",
-      "width": 2216.7
-    },
-    {
-      "name": "urdu typesetting",
-      "width": 2216.7
-    },
-    {
-      "name": "utsaah",
-      "width": 2216.7
-    },
-    {
-      "name": "vani",
-      "width": 2216.7
-    },
-    {
-      "name": "vijaya",
-      "width": 2216.7
-    },
-    {
-      "name": "vrinda",
-      "width": 2216.7
-    },
-    {
-      "name": "yu mincho",
-      "width": 2216.7
+      "name": "segoe ui light"
     }
   ],
+  "optional": [],
   "profiles": [
     {
-      "name": "win_office",
-      "weight": 40,
-      "optional": [
-        "century",
-        "century gothic",
-        "helv",
-        "haettenschweiler",
-        "leelawadee",
-        "ms outlook",
-        "ms reference specialty",
-        "ms ui gothic",
-        "mt extra",
-        "microsoft uighur",
-        "monotype corsiva",
-        "pristina",
-        "segoe ui light",
-        "small fonts"
-      ]
-    },
-    {
-      "name": "win_base",
+      "name": "win_clean",
       "weight": 35,
-      "optional": [
-        "century",
-        "century gothic",
-        "helv",
-        "haettenschweiler",
-        "leelawadee",
-        "ms ui gothic",
-        "microsoft uighur",
-        "monotype corsiva",
-        "pristina",
-        "segoe ui light",
-        "small fonts"
-      ]
+      "optional": []
     },
     {
-      "name": "win_lean",
-      "weight": 25,
-      "optional": [
-        "century",
-        "century gothic",
-        "helv",
-        "haettenschweiler",
-        "leelawadee",
-        "ms ui gothic",
-        "segoe ui light",
-        "small fonts"
-      ]
+      "name": "win_office",
+      "weight": 65,
+      "optional": []
     }
   ]
-}
\ No newline at end of file
+}
diff --git a/src/invisible_playwright/_fpforge/data/webgl_gpu_pool.json b/src/invisible_playwright/_fpforge/data/webgl_gpu_pool.json
index 34f757b..76f0fe5 100644
--- a/src/invisible_playwright/_fpforge/data/webgl_gpu_pool.json
+++ b/src/invisible_playwright/_fpforge/data/webgl_gpu_pool.json
@@ -3,7 +3,7 @@
   {
    "vendor": "Google Inc. (NVIDIA)",
    "renderer_out": "ANGLE (NVIDIA, NVIDIA GeForce GTX 980 Direct3D11 vs_5_0 ps_5_0), or similar",
-   "prob": 0.462396,
+   "prob": 0.470921,
    "prefs": {
     "zoom.stealth.webgl.renderer": "ANGLE (NVIDIA, NVIDIA GeForce GTX 980 Direct3D11 vs_5_0 ps_5_0, D3D11)",
     "zoom.stealth.webgl.vendor": "Google Inc. (NVIDIA)",
@@ -19,7 +19,7 @@
   {
    "vendor": "Google Inc. (Intel)",
    "renderer_out": "ANGLE (Intel, Intel(R) HD Graphics Direct3D11 vs_5_0 ps_5_0), or similar",
-   "prob": 0.192201,
+   "prob": 0.195745,
    "prefs": {
     "zoom.stealth.webgl.renderer": "ANGLE (Intel, Intel(R) HD Graphics Direct3D11 vs_5_0 ps_5_0, D3D11)",
     "zoom.stealth.webgl.vendor": "Google Inc. (Intel)",
@@ -35,7 +35,7 @@
   {
    "vendor": "Google Inc. (Intel)",
    "renderer_out": "ANGLE (Intel, Intel(R) HD Graphics 400 Direct3D11 vs_5_0 ps_5_0), or similar",
-   "prob": 0.157382,
+   "prob": 0.160284,
    "prefs": {
     "zoom.stealth.webgl.renderer": "ANGLE (Intel, Intel(R) HD Graphics 400 Direct3D11 vs_5_0 ps_5_0, D3D11)",
     "zoom.stealth.webgl.vendor": "Google Inc. (Intel)",
@@ -51,7 +51,7 @@
   {
    "vendor": "Google Inc. (AMD)",
    "renderer_out": "ANGLE (AMD, Radeon HD 3200 Graphics Direct3D11 vs_5_0 ps_5_0), or similar",
-   "prob": 0.084958,
+   "prob": 0.086524,
    "prefs": {
     "zoom.stealth.webgl.renderer": "ANGLE (AMD, Radeon HD 3200 Graphics Direct3D11 vs_5_0 ps_5_0, D3D11)",
     "zoom.stealth.webgl.vendor": "Google Inc. (AMD)",
@@ -67,7 +67,7 @@
   {
    "vendor": "Google Inc. (AMD)",
    "renderer_out": "ANGLE (AMD, Radeon R9 200 Series Direct3D11 vs_5_0 ps_5_0), or similar",
-   "prob": 0.052925,
+   "prob": 0.053901,
    "prefs": {
     "zoom.stealth.webgl.renderer": "ANGLE (AMD, Radeon R9 200 Series Direct3D11 vs_5_0 ps_5_0, D3D11)",
     "zoom.stealth.webgl.vendor": "Google Inc. (AMD)",
@@ -80,26 +80,10 @@
     "zoom.stealth.webgl2.enabled": true
    }
   },
-  {
-   "vendor": "Google Inc. (NVIDIA)",
-   "renderer_out": "ANGLE (NVIDIA, NVIDIA GeForce GTX 480 Direct3D11 vs_5_0 ps_5_0), or similar",
-   "prob": 0.013928,
-   "prefs": {
-    "zoom.stealth.webgl.renderer": "ANGLE (NVIDIA, NVIDIA GeForce GTX 480 Direct3D11 vs_5_0 ps_5_0, D3D11)",
-    "zoom.stealth.webgl.vendor": "Google Inc. (NVIDIA)",
-    "zoom.stealth.webgl.extensions": "ANGLE_instanced_arrays,EXT_blend_minmax,EXT_color_buffer_half_float,EXT_float_blend,EXT_frag_depth,EXT_shader_texture_lod,EXT_sRGB,EXT_texture_compression_bptc,EXT_texture_compression_rgtc,EXT_texture_filter_anisotropic,OES_element_index_uint,OES_fbo_render_mipmap,OES_standard_derivatives,OES_texture_float,OES_texture_float_linear,OES_texture_half_float,OES_texture_half_float_linear,OES_vertex_array_object,WEBGL_color_buffer_float,WEBGL_compressed_texture_s3tc,WEBGL_compressed_texture_s3tc_srgb,WEBGL_debug_renderer_info,WEBGL_debug_shaders,WEBGL_depth_texture,WEBGL_draw_buffers,WEBGL_lose_context,WEBGL_provoking_vertex",
-    "zoom.stealth.webgl2.extensions": "EXT_color_buffer_float,EXT_float_blend,EXT_texture_compression_bptc,EXT_texture_compression_rgtc,EXT_texture_filter_anisotropic,OES_draw_buffers_indexed,OES_texture_float_linear,OVR_multiview2,WEBGL_compressed_texture_s3tc,WEBGL_compressed_texture_s3tc_srgb,WEBGL_debug_renderer_info,WEBGL_debug_shaders,WEBGL_lose_context,WEBGL_provoking_vertex",
-    "zoom.stealth.webgl.int_params": "2849|1,2885|1029,2886|2305,2931|1,2932|513,2961|0,2962|519,2963|2147483647,2964|7680,2965|7680,2966|7680,2967|0,2968|2147483647,3074|1029,3314|0,3315|0,3316|0,3317|4,3330|0,3331|0,3332|0,3333|4,3379|16384,3408|4,3410|8,3411|8,3412|8,3413|8,3414|24,3415|0,10752|0,32777|32774,32824|0,32877|0,32878|0,32883|2048,32936|1,32937|4,32938|1,32968|0,32969|1,32970|0,32971|1,33000|2147483647,33001|2147483647,33170|4352,34016|33984,34024|16384,34045|2,34076|16384,34816|519,34817|7680,34818|7680,34819|7680,34852|8,34853|1029,34854|0,34855|0,34856|0,34857|0,34858|0,34859|0,34860|0,34877|32774,34921|16,34930|16,35071|2048,35076|-8,35077|7,35371|12,35373|12,35374|24,35375|24,35376|65536,35377|212988,35379|200704,35380|256,35657|4096,35658|16380,35659|120,35660|16,35661|32,35723|4352,35738|5121,35739|6408,35968|4,35978|120,35979|4,36003|0,36004|2147483647,36005|2147483647,36063|8,36183|8,36203|4294967294,36347|4095,36348|30,36349|1024,37137|0,37154|120,37157|120,37443|37444,37447|1000000000",
-    "zoom.stealth.webgl.int2_params": "2928|0:1,3386|32767:32767,33901|1:1024,33902|1:1",
-    "zoom.stealth.webgl.float_params": "",
-    "zoom.stealth.webgl.shader_precisions": "35633*36336|127:127:23,35633*36337|127:127:23,35633*36338|127:127:23,35633*36339|31:30:0,35633*36340|31:30:0,35633*36341|31:30:0,35632*36336|127:127:23,35632*36337|127:127:23,35632*36338|127:127:23,35632*36339|31:30:0,35632*36340|31:30:0,35632*36341|31:30:0",
-    "zoom.stealth.webgl2.enabled": true
-   }
-  },
   {
    "vendor": "Google Inc. (Microsoft)",
    "renderer_out": "ANGLE (Microsoft, Microsoft Basic Render Driver Direct3D11 vs_5_0 ps_5_0), or similar",
-   "prob": 0.012535,
+   "prob": 0.012766,
    "prefs": {
     "zoom.stealth.webgl.renderer": "ANGLE (Microsoft, Microsoft Basic Render Driver Direct3D11 vs_5_0 ps_5_0, D3D11)",
     "zoom.stealth.webgl.vendor": "Google Inc. (Microsoft)",
@@ -115,9 +99,9 @@
   {
    "vendor": "Google Inc. (Intel)",
    "renderer_out": "ANGLE (Intel, Intel(R) HD Graphics Direct3D11 vs_5_0 ps_5_0)",
-   "prob": 0.006964,
+   "prob": 0.007092,
    "prefs": {
-    "zoom.stealth.webgl.renderer": "ANGLE (Intel, Intel(R) HD Graphics Direct3D11 vs_5_0 ps_5_0)",
+    "zoom.stealth.webgl.renderer": "ANGLE (Intel, Intel(R) HD Graphics Direct3D11 vs_5_0 ps_5_0, D3D11)",
     "zoom.stealth.webgl.vendor": "Google Inc. (Intel)",
     "zoom.stealth.webgl.extensions": "ANGLE_instanced_arrays,EXT_blend_minmax,EXT_color_buffer_half_float,EXT_float_blend,EXT_frag_depth,EXT_shader_texture_lod,EXT_sRGB,EXT_texture_compression_bptc,EXT_texture_compression_rgtc,EXT_texture_filter_anisotropic,OES_element_index_uint,OES_fbo_render_mipmap,OES_standard_derivatives,OES_texture_float,OES_texture_float_linear,OES_texture_half_float,OES_texture_half_float_linear,OES_vertex_array_object,WEBGL_color_buffer_float,WEBGL_compressed_texture_s3tc,WEBGL_compressed_texture_s3tc_srgb,WEBGL_debug_renderer_info,WEBGL_debug_shaders,WEBGL_depth_texture,WEBGL_draw_buffers,WEBGL_lose_context,WEBGL_provoking_vertex",
     "zoom.stealth.webgl2.extensions": "EXT_color_buffer_float,EXT_float_blend,EXT_texture_compression_bptc,EXT_texture_compression_rgtc,EXT_texture_filter_anisotropic,OES_draw_buffers_indexed,OES_texture_float_linear,OVR_multiview2,WEBGL_compressed_texture_s3tc,WEBGL_compressed_texture_s3tc_srgb,WEBGL_debug_renderer_info,WEBGL_debug_shaders,WEBGL_lose_context,WEBGL_provoking_vertex",
@@ -131,7 +115,7 @@
   {
    "vendor": "Google Inc. (Intel)",
    "renderer_out": "ANGLE (Intel, Intel(R) HD Graphics Direct3D11 vs_4_1 ps_4_1), or similar",
-   "prob": 0.004178,
+   "prob": 0.004255,
    "prefs": {
     "zoom.stealth.webgl.renderer": "ANGLE (Intel, Intel(R) HD Graphics Direct3D11 vs_4_1 ps_4_1, D3D11)",
     "zoom.stealth.webgl.vendor": "Google Inc. (Intel)",
@@ -144,28 +128,12 @@
     "zoom.stealth.webgl2.enabled": true
    }
   },
-  {
-   "vendor": "Google Inc. (Google)",
-   "renderer_out": "ANGLE (Google, Vulkan 1.3.0 (SwiftShader Device (Subzero) (0x0000C0DE)), SwiftShader driver)",
-   "prob": 0.002786,
-   "prefs": {
-    "zoom.stealth.webgl.renderer": "ANGLE (Google, Vulkan 1.3.0 (SwiftShader Device (Subzero) (0x0000C0DE)), SwiftShader driver)",
-    "zoom.stealth.webgl.vendor": "Google Inc. (Google)",
-    "zoom.stealth.webgl.extensions": "ANGLE_instanced_arrays,EXT_blend_minmax,EXT_color_buffer_half_float,EXT_float_blend,EXT_frag_depth,EXT_shader_texture_lod,EXT_texture_compression_bptc,EXT_texture_compression_rgtc,EXT_texture_filter_anisotropic,EXT_sRGB,OES_element_index_uint,OES_fbo_render_mipmap,OES_standard_derivatives,OES_texture_float,OES_texture_float_linear,OES_texture_half_float,OES_texture_half_float_linear,OES_vertex_array_object,WEBGL_color_buffer_float,WEBGL_compressed_texture_astc,WEBGL_compressed_texture_etc,WEBGL_compressed_texture_etc1,WEBGL_compressed_texture_s3tc,WEBGL_compressed_texture_s3tc_srgb,WEBGL_debug_renderer_info,WEBGL_depth_texture,WEBGL_draw_buffers,WEBGL_lose_context,WEBGL_multi_draw",
-    "zoom.stealth.webgl2.extensions": "EXT_color_buffer_float,EXT_color_buffer_half_float,EXT_float_blend,EXT_texture_compression_bptc,EXT_texture_compression_rgtc,EXT_texture_filter_anisotropic,EXT_texture_norm16,OES_draw_buffers_indexed,OES_texture_float_linear,OVR_multiview2,WEBGL_clip_cull_distance,WEBGL_compressed_texture_astc,WEBGL_compressed_texture_etc,WEBGL_compressed_texture_etc1,WEBGL_compressed_texture_s3tc,WEBGL_compressed_texture_s3tc_srgb,WEBGL_debug_renderer_info,WEBGL_lose_context,WEBGL_multi_draw",
-    "zoom.stealth.webgl.int_params": "2849|1,2885|1029,2886|2305,2931|1,2932|513,2961|0,2962|519,2963|2147483647,2964|7680,2965|7680,2966|7680,2967|0,2968|2147483647,3074|1029,3314|0,3315|0,3316|0,3317|4,3330|0,3331|0,3332|0,3333|4,3379|8192,3408|4,3410|8,3411|8,3412|8,3413|8,3414|24,3415|0,10752|0,32777|32774,32824|0,32877|0,32878|0,32883|2048,32936|1,32937|4,32938|1,32968|0,32969|1,32970|0,32971|1,33000|2147483647,33001|2147483647,33170|4352,34016|33984,34024|8192,34045|15,34076|16384,34816|519,34817|7680,34818|7680,34819|7680,34852|8,34853|1029,34854|1029,34855|1029,34856|1029,34857|1029,34858|1029,34859|1029,34860|1029,34877|32774,34921|16,34930|32,35071|2048,35076|-8,35077|7,35371|14,35373|14,35374|60,35375|72,35376|65536,35377|245760,35379|245760,35380|256,35657|16384,35658|16384,35659|124,35660|32,35661|64,35723|4352,35738|5121,35739|6408,35968|4,35978|128,35979|4,36003|0,36004|2147483647,36005|2147483647,36063|8,36183|4,36203|4294967294,36345|1,36347|4096,36348|31,36349|4096,37137|0,37154|128,37157|128,37443|37444,37447|0",
-    "zoom.stealth.webgl.int2_params": "2928|0:1,3386|8192:8192,33901|1:1023,33902|1:1",
-    "zoom.stealth.webgl.float_params": "",
-    "zoom.stealth.webgl.shader_precisions": "35633*36336|15:15:10,35633*36337|15:15:10,35633*36338|127:127:23,35633*36339|15:14:0,35633*36340|15:14:0,35633*36341|31:30:0,35632*36336|15:15:10,35632*36337|15:15:10,35632*36338|127:127:23,35632*36339|15:14:0,35632*36340|15:14:0,35632*36341|31:30:0",
-    "zoom.stealth.webgl2.enabled": true
-   }
-  },
   {
    "vendor": "Google Inc. (AMD)",
    "renderer_out": "ANGLE (AMD, Radeon R9 200 Series Direct3D11 vs_5_0 ps_5_0)",
-   "prob": 0.001393,
+   "prob": 0.001419,
    "prefs": {
-    "zoom.stealth.webgl.renderer": "ANGLE (AMD, Radeon R9 200 Series Direct3D11 vs_5_0 ps_5_0)",
+    "zoom.stealth.webgl.renderer": "ANGLE (AMD, Radeon R9 200 Series Direct3D11 vs_5_0 ps_5_0, D3D11)",
     "zoom.stealth.webgl.vendor": "Google Inc. (AMD)",
     "zoom.stealth.webgl.extensions": "ANGLE_instanced_arrays,EXT_blend_minmax,EXT_color_buffer_half_float,EXT_float_blend,EXT_frag_depth,EXT_shader_texture_lod,EXT_sRGB,EXT_texture_compression_bptc,EXT_texture_compression_rgtc,EXT_texture_filter_anisotropic,OES_element_index_uint,OES_fbo_render_mipmap,OES_standard_derivatives,OES_texture_float,OES_texture_float_linear,OES_texture_half_float,OES_texture_half_float_linear,OES_vertex_array_object,WEBGL_color_buffer_float,WEBGL_compressed_texture_s3tc,WEBGL_compressed_texture_s3tc_srgb,WEBGL_debug_renderer_info,WEBGL_debug_shaders,WEBGL_depth_texture,WEBGL_draw_buffers,WEBGL_lose_context,WEBGL_provoking_vertex",
     "zoom.stealth.webgl2.extensions": "EXT_color_buffer_float,EXT_float_blend,EXT_texture_compression_bptc,EXT_texture_compression_rgtc,EXT_texture_filter_anisotropic,OES_draw_buffers_indexed,OES_texture_float_linear,OVR_multiview2,WEBGL_compressed_texture_s3tc,WEBGL_compressed_texture_s3tc_srgb,WEBGL_debug_renderer_info,WEBGL_debug_shaders,WEBGL_lose_context,WEBGL_provoking_vertex",
@@ -179,9 +147,9 @@
   {
    "vendor": "Google Inc. (Intel)",
    "renderer_out": "ANGLE (Intel, Intel(R) HD Graphics Direct3D11 vs_4_0 ps_4_0)",
-   "prob": 0.001393,
+   "prob": 0.001419,
    "prefs": {
-    "zoom.stealth.webgl.renderer": "ANGLE (Intel, Intel(R) HD Graphics Direct3D11 vs_4_0 ps_4_0)",
+    "zoom.stealth.webgl.renderer": "ANGLE (Intel, Intel(R) HD Graphics Direct3D11 vs_4_0 ps_4_0, D3D11)",
     "zoom.stealth.webgl.vendor": "Google Inc. (Intel)",
     "zoom.stealth.webgl.extensions": "ANGLE_instanced_arrays,EXT_blend_minmax,EXT_color_buffer_half_float,EXT_float_blend,EXT_frag_depth,EXT_shader_texture_lod,EXT_sRGB,EXT_texture_compression_rgtc,EXT_texture_filter_anisotropic,OES_element_index_uint,OES_fbo_render_mipmap,OES_standard_derivatives,OES_texture_float,OES_texture_float_linear,OES_texture_half_float,OES_texture_half_float_linear,OES_vertex_array_object,WEBGL_color_buffer_float,WEBGL_compressed_texture_s3tc,WEBGL_compressed_texture_s3tc_srgb,WEBGL_debug_renderer_info,WEBGL_debug_shaders,WEBGL_depth_texture,WEBGL_draw_buffers,WEBGL_lose_context,WEBGL_provoking_vertex",
     "zoom.stealth.webgl2.extensions": "",
@@ -195,9 +163,9 @@
   {
    "vendor": "Google Inc. (NVIDIA)",
    "renderer_out": "ANGLE (NVIDIA, NVIDIA GeForce 8800 GTX Direct3D11 vs_4_0 ps_4_0)",
-   "prob": 0.001393,
+   "prob": 0.001419,
    "prefs": {
-    "zoom.stealth.webgl.renderer": "ANGLE (NVIDIA, NVIDIA GeForce 8800 GTX Direct3D11 vs_4_0 ps_4_0)",
+    "zoom.stealth.webgl.renderer": "ANGLE (NVIDIA, NVIDIA GeForce 8800 GTX Direct3D11 vs_4_0 ps_4_0, D3D11)",
     "zoom.stealth.webgl.vendor": "Google Inc. (NVIDIA)",
     "zoom.stealth.webgl.extensions": "ANGLE_instanced_arrays,EXT_blend_minmax,EXT_color_buffer_half_float,EXT_float_blend,EXT_frag_depth,EXT_shader_texture_lod,EXT_sRGB,EXT_texture_compression_rgtc,EXT_texture_filter_anisotropic,OES_element_index_uint,OES_fbo_render_mipmap,OES_standard_derivatives,OES_texture_float,OES_texture_float_linear,OES_texture_half_float,OES_texture_half_float_linear,OES_vertex_array_object,WEBGL_color_buffer_float,WEBGL_compressed_texture_s3tc,WEBGL_compressed_texture_s3tc_srgb,WEBGL_debug_renderer_info,WEBGL_debug_shaders,WEBGL_depth_texture,WEBGL_draw_buffers,WEBGL_lose_context,WEBGL_provoking_vertex",
     "zoom.stealth.webgl2.extensions": "",
@@ -211,9 +179,9 @@
   {
    "vendor": "Google Inc. (Intel)",
    "renderer_out": "ANGLE (Intel, Intel 945GM Direct3D11 vs_4_0 ps_4_0)",
-   "prob": 0.001393,
+   "prob": 0.001419,
    "prefs": {
-    "zoom.stealth.webgl.renderer": "ANGLE (Intel, Intel 945GM Direct3D11 vs_4_0 ps_4_0)",
+    "zoom.stealth.webgl.renderer": "ANGLE (Intel, Intel 945GM Direct3D11 vs_4_0 ps_4_0, D3D11)",
     "zoom.stealth.webgl.vendor": "Google Inc. (Intel)",
     "zoom.stealth.webgl.extensions": "ANGLE_instanced_arrays,EXT_blend_minmax,EXT_color_buffer_half_float,EXT_float_blend,EXT_frag_depth,EXT_shader_texture_lod,EXT_sRGB,EXT_texture_compression_rgtc,EXT_texture_filter_anisotropic,OES_element_index_uint,OES_fbo_render_mipmap,OES_standard_derivatives,OES_texture_float,OES_texture_half_float,OES_texture_half_float_linear,OES_vertex_array_object,WEBGL_color_buffer_float,WEBGL_compressed_texture_s3tc,WEBGL_compressed_texture_s3tc_srgb,WEBGL_debug_renderer_info,WEBGL_debug_shaders,WEBGL_depth_texture,WEBGL_draw_buffers,WEBGL_lose_context,WEBGL_provoking_vertex",
     "zoom.stealth.webgl2.extensions": "",
@@ -227,9 +195,9 @@
   {
    "vendor": "Google Inc. (Intel)",
    "renderer_out": "ANGLE (Intel, Intel(R) HD Graphics Direct3D11 vs_4_1 ps_4_1)",
-   "prob": 0.001393,
+   "prob": 0.001419,
    "prefs": {
-    "zoom.stealth.webgl.renderer": "ANGLE (Intel, Intel(R) HD Graphics Direct3D11 vs_4_1 ps_4_1)",
+    "zoom.stealth.webgl.renderer": "ANGLE (Intel, Intel(R) HD Graphics Direct3D11 vs_4_1 ps_4_1, D3D11)",
     "zoom.stealth.webgl.vendor": "Google Inc. (Intel)",
     "zoom.stealth.webgl.extensions": "ANGLE_instanced_arrays,EXT_blend_minmax,EXT_color_buffer_half_float,EXT_float_blend,EXT_frag_depth,EXT_shader_texture_lod,EXT_sRGB,EXT_texture_compression_rgtc,EXT_texture_filter_anisotropic,OES_element_index_uint,OES_fbo_render_mipmap,OES_standard_derivatives,OES_texture_float,OES_texture_float_linear,OES_texture_half_float,OES_texture_half_float_linear,OES_vertex_array_object,WEBGL_color_buffer_float,WEBGL_compressed_texture_s3tc,WEBGL_compressed_texture_s3tc_srgb,WEBGL_debug_renderer_info,WEBGL_debug_shaders,WEBGL_depth_texture,WEBGL_draw_buffers,WEBGL_lose_context,WEBGL_provoking_vertex",
     "zoom.stealth.webgl2.extensions": "EXT_color_buffer_float,EXT_float_blend,EXT_texture_compression_rgtc,EXT_texture_filter_anisotropic,OES_draw_buffers_indexed,OES_texture_float_linear,WEBGL_compressed_texture_s3tc,WEBGL_compressed_texture_s3tc_srgb,WEBGL_debug_renderer_info,WEBGL_debug_shaders,WEBGL_lose_context,WEBGL_provoking_vertex",
@@ -243,25 +211,9 @@
   {
    "vendor": "Google Inc. (NVIDIA)",
    "renderer_out": "ANGLE (NVIDIA, NVIDIA GeForce GTX 980 Direct3D11 vs_5_0 ps_5_0)",
-   "prob": 0.001393,
+   "prob": 0.001419,
    "prefs": {
-    "zoom.stealth.webgl.renderer": "ANGLE (NVIDIA, NVIDIA GeForce GTX 980 Direct3D11 vs_5_0 ps_5_0)",
-    "zoom.stealth.webgl.vendor": "Google Inc. (NVIDIA)",
-    "zoom.stealth.webgl.extensions": "ANGLE_instanced_arrays,EXT_blend_minmax,EXT_color_buffer_half_float,EXT_float_blend,EXT_frag_depth,EXT_shader_texture_lod,EXT_sRGB,EXT_texture_compression_bptc,EXT_texture_compression_rgtc,EXT_texture_filter_anisotropic,OES_element_index_uint,OES_fbo_render_mipmap,OES_standard_derivatives,OES_texture_float,OES_texture_float_linear,OES_texture_half_float,OES_texture_half_float_linear,OES_vertex_array_object,WEBGL_color_buffer_float,WEBGL_compressed_texture_s3tc,WEBGL_compressed_texture_s3tc_srgb,WEBGL_debug_renderer_info,WEBGL_debug_shaders,WEBGL_depth_texture,WEBGL_draw_buffers,WEBGL_lose_context,WEBGL_provoking_vertex",
-    "zoom.stealth.webgl2.extensions": "EXT_color_buffer_float,EXT_float_blend,EXT_texture_compression_bptc,EXT_texture_compression_rgtc,EXT_texture_filter_anisotropic,OES_draw_buffers_indexed,OES_texture_float_linear,OVR_multiview2,WEBGL_compressed_texture_s3tc,WEBGL_compressed_texture_s3tc_srgb,WEBGL_debug_renderer_info,WEBGL_debug_shaders,WEBGL_lose_context,WEBGL_provoking_vertex",
-    "zoom.stealth.webgl.int_params": "2849|1,2885|1029,2886|2305,2931|1,2932|513,2961|0,2962|519,2963|2147483647,2964|7680,2965|7680,2966|7680,2967|0,2968|2147483647,3074|1029,3314|0,3315|0,3316|0,3317|4,3330|0,3331|0,3332|0,3333|4,3379|16384,3408|4,3410|8,3411|8,3412|8,3413|8,3414|24,3415|0,10752|0,32777|32774,32824|0,32877|0,32878|0,32883|2048,32936|1,32937|4,32938|1,32968|0,32969|1,32970|0,32971|1,33000|2147483647,33001|2147483647,33170|4352,34016|33984,34024|16384,34045|2,34076|16384,34816|519,34817|7680,34818|7680,34819|7680,34852|8,34853|1029,34854|0,34855|0,34856|0,34857|0,34858|0,34859|0,34860|0,34877|32774,34921|16,34930|16,35071|2048,35076|-8,35077|7,35371|12,35373|12,35374|24,35375|24,35376|65536,35377|212988,35379|200704,35380|256,35657|4096,35658|16380,35659|120,35660|16,35661|32,35723|4352,35738|5121,35739|6408,35968|4,35978|120,35979|4,36003|0,36004|2147483647,36005|2147483647,36063|8,36183|8,36203|4294967294,36347|4095,36348|30,36349|1024,37137|0,37154|120,37157|120,37443|37444,37447|1000000000",
-    "zoom.stealth.webgl.int2_params": "2928|0:1,3386|32767:32767,33901|1:1024,33902|1:1",
-    "zoom.stealth.webgl.float_params": "",
-    "zoom.stealth.webgl.shader_precisions": "35633*36336|127:127:23,35633*36337|127:127:23,35633*36338|127:127:23,35633*36339|31:30:0,35633*36340|31:30:0,35633*36341|31:30:0,35632*36336|127:127:23,35632*36337|127:127:23,35632*36338|127:127:23,35632*36339|31:30:0,35632*36340|31:30:0,35632*36341|31:30:0",
-    "zoom.stealth.webgl2.enabled": true
-   }
-  },
-  {
-   "vendor": "Google Inc. (NVIDIA)",
-   "renderer_out": "ANGLE (NVIDIA, NVIDIA GeForce GTX 480 Direct3D11 vs_5_0 ps_5_0)",
-   "prob": 0.001393,
-   "prefs": {
-    "zoom.stealth.webgl.renderer": "ANGLE (NVIDIA, NVIDIA GeForce GTX 480 Direct3D11 vs_5_0 ps_5_0)",
+    "zoom.stealth.webgl.renderer": "ANGLE (NVIDIA, NVIDIA GeForce GTX 980 Direct3D11 vs_5_0 ps_5_0, D3D11)",
     "zoom.stealth.webgl.vendor": "Google Inc. (NVIDIA)",
     "zoom.stealth.webgl.extensions": "ANGLE_instanced_arrays,EXT_blend_minmax,EXT_color_buffer_half_float,EXT_float_blend,EXT_frag_depth,EXT_shader_texture_lod,EXT_sRGB,EXT_texture_compression_bptc,EXT_texture_compression_rgtc,EXT_texture_filter_anisotropic,OES_element_index_uint,OES_fbo_render_mipmap,OES_standard_derivatives,OES_texture_float,OES_texture_float_linear,OES_texture_half_float,OES_texture_half_float_linear,OES_vertex_array_object,WEBGL_color_buffer_float,WEBGL_compressed_texture_s3tc,WEBGL_compressed_texture_s3tc_srgb,WEBGL_debug_renderer_info,WEBGL_debug_shaders,WEBGL_depth_texture,WEBGL_draw_buffers,WEBGL_lose_context,WEBGL_provoking_vertex",
     "zoom.stealth.webgl2.extensions": "EXT_color_buffer_float,EXT_float_blend,EXT_texture_compression_bptc,EXT_texture_compression_rgtc,EXT_texture_filter_anisotropic,OES_draw_buffers_indexed,OES_texture_float_linear,OVR_multiview2,WEBGL_compressed_texture_s3tc,WEBGL_compressed_texture_s3tc_srgb,WEBGL_debug_renderer_info,WEBGL_debug_shaders,WEBGL_lose_context,WEBGL_provoking_vertex",
diff --git a/src/invisible_playwright/_geo.py b/src/invisible_playwright/_geo.py
index 7423b2b..5c552f2 100644
--- a/src/invisible_playwright/_geo.py
+++ b/src/invisible_playwright/_geo.py
@@ -136,6 +136,56 @@ def ip_to_timezone(ip: str, mmdb_path: Any) -> str:
     return tz
 
 
+# ISO 3166 country code -> the primary BCP-47 locale a real Windows machine in that
+# country most commonly runs. Multi-language countries use the majority language; the
+# user can always force a specific locale instead of "auto". Unknown -> en-US.
+_COUNTRY_LOCALE = {
+    "US": "en-US", "GB": "en-GB", "CA": "en-CA", "AU": "en-AU", "NZ": "en-NZ", "IE": "en-IE",
+    "ZA": "en-ZA", "IN": "en-IN", "SG": "en-SG", "PH": "en-PH",
+    "FR": "fr-FR", "BE": "fr-BE", "LU": "fr-LU",
+    "DE": "de-DE", "AT": "de-AT", "CH": "de-CH",
+    "IT": "it-IT", "ES": "es-ES", "PT": "pt-PT", "NL": "nl-NL",
+    "SE": "sv-SE", "NO": "nb-NO", "DK": "da-DK", "FI": "fi-FI", "IS": "is-IS",
+    "PL": "pl-PL", "CZ": "cs-CZ", "SK": "sk-SK", "HU": "hu-HU", "RO": "ro-RO",
+    "GR": "el-GR", "BG": "bg-BG", "HR": "hr-HR", "RS": "sr-RS", "SI": "sl-SI",
+    "RU": "ru-RU", "UA": "uk-UA", "TR": "tr-TR", "IL": "he-IL",
+    "BR": "pt-BR", "MX": "es-MX", "AR": "es-AR", "CL": "es-CL", "CO": "es-CO", "PE": "es-PE",
+    "JP": "ja-JP", "KR": "ko-KR", "CN": "zh-CN", "TW": "zh-TW", "HK": "zh-HK",
+    "ID": "id-ID", "TH": "th-TH", "VN": "vi-VN", "MY": "ms-MY",
+    "SA": "ar-SA", "AE": "ar-AE", "EG": "ar-EG",
+}
+
+
+def ip_to_locale(ip: str, mmdb_path: Any) -> str:
+    """Map ``ip`` -> a BCP-47 locale via the MaxMind ``country.iso_code`` field, so the
+    browser language stays consistent with the proxy egress country. Falls back to
+    ``en-US`` for IPs absent from the DB or countries we don't map."""
+    import maxminddb
+
+    with maxminddb.open_database(str(mmdb_path)) as reader:
+        record = reader.get(ip)
+    cc = ""
+    if isinstance(record, dict):
+        cc = ((record.get("country") or {}).get("iso_code") or "")
+    return _COUNTRY_LOCALE.get(cc.upper(), "en-US")
+
+
+def resolve_session_locale(egress_ip: Optional[str], proxy: Optional[Dict[str, str]]) -> str:
+    """Resolve ``locale="auto"`` to a BCP-47 locale from the egress country. Behind a proxy
+    it reuses the already-discovered ``egress_ip`` (no extra round-trip); without a proxy it
+    discovers the host's public IP. On any failure it returns ``en-US`` (never breaks launch
+    — locale is cosmetic, unlike timezone which traps a foreign-proxy mismatch)."""
+    from .download import ensure_geoip_mmdb
+
+    try:
+        ip = egress_ip if _proxy_is_set(proxy) else discover_egress_ip(None)
+        if ip is None:
+            return "en-US"
+        return ip_to_locale(ip, ensure_geoip_mmdb())
+    except Exception:  # noqa: BLE001
+        return "en-US"
+
+
 class SessionGeo(NamedTuple):
     """Geo facts resolved once per session from a single egress round-trip.
 
diff --git a/src/invisible_playwright/_webgl_personas.py b/src/invisible_playwright/_webgl_personas.py
index 3381b6c..18ab1b1 100644
--- a/src/invisible_playwright/_webgl_personas.py
+++ b/src/invisible_playwright/_webgl_personas.py
@@ -185,6 +185,12 @@ def forced_gpu_class(seed: int) -> Optional[str]:
 # only on the retired amd/arc mix) → dropped. NVIDIA is the worst case, so these are clean on
 # amd/intel too. hw_seed = the canvas/WebGL gamma render hash (the dominant consistency-score
 # driver); host-calibrated.
+# 2026-06-21: with WebGL Option B (zoom.stealth.webgl.substitute_pixels, ON in prefs.py) the WebGL
+# render hash is hash(seed,idx) = HOST-INDEPENDENT, so this list NO LONGER needs per-host calibration
+# — it only supplies per-session diversity. A 2026-06-21 attempt to re-calibrate it per-host FAILED
+# cross-OS: hw_seed clean on Windows went dirty on the Linux GL backend (b008 0.034->0.839; Win-dirty
+# {7,11,20,27} = Linux-clean and vice-versa; + identity×hw_seed interaction on Linux). That proved
+# calibration can't work cross-host → substitution replaces it. Kept the original diverse 9-set.
 CLEAN_RENDER_SEEDS = [0, 5, 6, 9, 11, 16, 19, 20, 28]
 
 
diff --git a/src/invisible_playwright/async_api.py b/src/invisible_playwright/async_api.py
index 8555b3f..2c04938 100644
--- a/src/invisible_playwright/async_api.py
+++ b/src/invisible_playwright/async_api.py
@@ -48,7 +48,7 @@ class InvisiblePlaywright:
         proxy: Optional[Dict[str, str]] = None,
         extra_args: Optional[list[str]] = None,
         humanize: Union[bool, float] = True,
-        locale: str = "en-US",
+        locale: str = "auto",
         timezone: str = "",
         extra_prefs: Optional[Dict[str, Any]] = None,
         binary_path: Optional[str] = None,
@@ -90,6 +90,14 @@ class InvisiblePlaywright:
         )
         self._timezone = _geo.timezone
         self._webrtc_egress_ip = _geo.egress_ip
+        # Geo-aware locale: "auto" derives the language from the egress country (reusing
+        # the egress IP just discovered), like timezone="auto". Keeps the browser language
+        # consistent with the proxy's country instead of a fixed en-US.
+        if (self._locale or "").strip().lower() == "auto":
+            from ._geo import resolve_session_locale
+            self._locale = await asyncio.to_thread(
+                resolve_session_locale, _geo.egress_ip, self._proxy
+            )
         executable = self._binary_path or ensure_binary()
         prefs = translate_profile_to_prefs(
             self._profile,
@@ -113,7 +121,7 @@ class InvisiblePlaywright:
             prefs["stealthfox.humanize.maxTime"] = str(cap)
         playwright_proxy = _configure_proxy_shared(self._proxy, prefs)
         pw_headless = self._resolve_headless()
-        env = self._build_env()
+        env = self._build_env(prefs)
         try:
             self._pw = await async_playwright().start()
             if self._profile_dir is not None:
@@ -214,11 +222,21 @@ class InvisiblePlaywright:
                 pass
             self._virtual_display = None
 
-    def _build_env(self) -> Dict[str, str]:
+    def _build_env(self, prefs: Dict[str, Any]) -> Dict[str, str]:
         import os as _os
         env = _os.environ.copy()
         if self._timezone:
             env["TZ"] = _tz_env(self._timezone)
+        # Font allow-list + system-ui via env (read at the gfxPlatformFontList
+        # constructor, process start) — Playwright delivers firefox_user_prefs
+        # over the juggler protocol after start, too late for the font list ctor,
+        # so without this host fonts leak on Linux/macOS. See sync launcher.
+        fontlist = prefs.get("zoom.stealth.font.fontlist")
+        if fontlist:
+            env["STEALTHFOX_FONTLIST"] = fontlist
+        system_ui = prefs.get("zoom.stealth.font.system_ui")
+        if system_ui:
+            env["STEALTHFOX_SYSTEMUI"] = system_ui
         # WebRTC srflx override: feed nICEr's nr_stealth_bridge the proxy egress
         # IP (caller's explicit env var wins, else the IP auto-discovered in
         # __aenter__) and drop IPv6 from gathering behind a proxy.
diff --git a/src/invisible_playwright/launcher.py b/src/invisible_playwright/launcher.py
index 510fa0f..559ba2f 100644
--- a/src/invisible_playwright/launcher.py
+++ b/src/invisible_playwright/launcher.py
@@ -110,7 +110,7 @@ class InvisiblePlaywright:
         proxy: Optional[Dict[str, str]] = None,
         extra_args: Optional[list[str]] = None,
         humanize: Union[bool, float] = True,
-        locale: str = "en-US",
+        locale: str = "auto",
         timezone: str = "",
         extra_prefs: Optional[Dict[str, Any]] = None,
         binary_path: Optional[str] = None,
@@ -135,8 +135,15 @@ class InvisiblePlaywright:
                 into a Bezier trajectory with ~10 ms between waypoints.
                 Default ``True`` (~1.5 s max motion). ``False`` disables;
                 a float caps the motion in seconds.
-            locale: BCP-47 tag (e.g. ``"en-US"``). Drives the
-                ``Accept-Language`` header and ``navigator.language``.
+            locale: BCP-47 tag (e.g. ``"en-US"``) or ``"auto"`` (default).
+                ``"auto"`` derives the locale from the egress country — the proxy
+                egress IP, or the host's public IP without a proxy — exactly like
+                ``timezone="auto"``, keeping the browser language consistent with the
+                exit country (a French proxy → ``fr-FR``). Drives
+                ``intl.accept_languages`` → both ``navigator.language``/``languages``
+                AND the q-valued ``Accept-Language`` header (the patched binary builds
+                the header from the pref, never from the raw Playwright locale override,
+                so the two never diverge — see nsHttpHandler STEALTHFOX note).
             timezone: IANA zone (e.g. ``"America/New_York"``) — used as-is
                 when set, the only way to force a specific zone. ``""``
                 (default) or ``"auto"`` ALWAYS resolves from the egress IP:
@@ -199,11 +206,17 @@ class InvisiblePlaywright:
         _geo = prepare_session_geo(self._timezone, self._proxy)
         self._timezone = _geo.timezone
         self._webrtc_egress_ip = _geo.egress_ip
+        # Geo-aware locale: "auto" derives the language from the egress country (reusing
+        # the egress IP already discovered above), like timezone="auto". Keeps the browser
+        # language consistent with the proxy's country instead of a fixed en-US.
+        if (self._locale or "").strip().lower() == "auto":
+            from ._geo import resolve_session_locale
+            self._locale = resolve_session_locale(_geo.egress_ip, self._proxy)
         executable = self._binary_path or ensure_binary()
         prefs = self._build_prefs()
         playwright_proxy = _configure_proxy_shared(self._proxy, prefs)
         pw_headless = self._resolve_headless()
-        env = self._build_env()
+        env = self._build_env(prefs)
 
         try:
             self._pw = sync_playwright().start()
@@ -358,7 +371,7 @@ class InvisiblePlaywright:
             prefs["stealthfox.humanize.maxTime"] = str(self._humanize_max_seconds())
         return prefs
 
-    def _build_env(self) -> Dict[str, str]:
+    def _build_env(self, prefs: Dict[str, Any]) -> Dict[str, str]:
         """Env vars passed to the Firefox subprocess.
 
         ``TZ`` tunes the libc clock the content process reads for
@@ -369,11 +382,24 @@ class InvisiblePlaywright:
         a synthetic srflx candidate matching the proxy egress IP, avoiding
         the StaticPref IPC propagation timing issue between parent and
         socket processes.
+        ``STEALTHFOX_FONTLIST`` / ``STEALTHFOX_SYSTEMUI`` carry the font
+        allow-list + system-ui family for the SAME reason: the binary reads
+        them at the gfxPlatformFontList constructor (process start), but
+        Playwright delivers firefox_user_prefs over the juggler protocol
+        AFTER start — too late for the font list ctor. The env var is present
+        at start and inherited by content processes, so the allow-list is
+        applied on every host (without it, host fonts leak on Linux/macOS).
         """
         import os as _os
         env = _os.environ.copy()
         if self._timezone:
             env["TZ"] = _tz_env(self._timezone)
+        fontlist = prefs.get("zoom.stealth.font.fontlist")
+        if fontlist:
+            env["STEALTHFOX_FONTLIST"] = fontlist
+        system_ui = prefs.get("zoom.stealth.font.system_ui")
+        if system_ui:
+            env["STEALTHFOX_SYSTEMUI"] = system_ui
         # WebRTC srflx override: feed nICEr's nr_stealth_bridge the proxy egress
         # IP so the srflx candidate matches the proxy (not the real host the
         # UDP STUN would otherwise leak). An explicit env var set by the caller
diff --git a/src/invisible_playwright/prefs.py b/src/invisible_playwright/prefs.py
index d50bd2d..f06778e 100644
--- a/src/invisible_playwright/prefs.py
+++ b/src/invisible_playwright/prefs.py
@@ -170,39 +170,6 @@ _WIN_VOICES = ",".join([
 ])
 
 
-# ──────────────────────────────────────────────────────────────────────
-#  Linux font compensation — Linux Firefox uses DejaVu / Liberation
-#  fonts which have wider/narrower glyphs than Windows Arial / Segoe.
-#  These per-generic factors are prepended to ``zoom.stealth.font.metrics``
-#  on Linux only; Windows-native rendering already matches the canonical
-#  widths so we pass an empty string (any factor !=1 would distort real
-#  metrics).
-# ──────────────────────────────────────────────────────────────────────
-
-_LINUX_GENERIC_FONT_FACTORS = (
-    # GENERIC factors are calibrated to FP Pro's font_preferences probe (NOT the 72px named-probe
-    # scale — verified 2026-06-18: recalibrating to the named-probe scale broke them, mono 121.55
-    # -> 112.4; the original values are correct for font_preferences). DejaVu/Liberation generics
-    # vs Windows targets: serif 0.920, sans 0.889, monospace 1.000, system-ui 0.910.
-    "serif|0.920,sans-serif|0.889,monospace|1.000,"
-    "system-ui|0.910,cursive|0.932,fantasy|0.812,"
-)
-
-# Calibration reference string for the C++ self-calibrating absolute-width path.
-# MUST be byte-identical to the probe the font_pool widths were measured with
-# (72px canvas measureText) and to the binary's zoom.stealth.font.calib_ref
-# default. Set explicitly so correctness never depends on the binary default.
-_FONT_CALIB_REF = "mmmmwwwwiiiillloooMMMMWWWW0123456789 The quick brown fox"
-# NOTE: there is intentionally NO per-OS collapse-base table here anymore.
-# The C++ font hook self-calibrates: `font_pool` stores the UNIVERSAL real
-# Windows measureText width per font and the binary divides it by the host's
-# own collapse base (gfxTextRun::StealthCollapseBase, summed from the list-head
-# font's per-glyph advances over zoom.stealth.font.calib_ref). So the SAME
-# stored value yields the exact Windows width on Windows, Linux AND macOS with
-# nothing to measure per platform. (Was: _COLLAPSE_BASE = {win32:1530, linux:2400}
-# + a darwin TODO — removed 2026-06-18 when the self-calibrating C++ landed.)
-
-
 # ──────────────────────────────────────────────────────────────────────
 #  Baseline — applied to every session regardless of Profile.
 # ──────────────────────────────────────────────────────────────────────
@@ -374,9 +341,37 @@ _BASELINE: Dict[str, Any] = {
     # DevTools anti-detection.
     "zoom.stealth.debugger.force_detach":                 True,
 
-    # Canvas substitution — additive ±1 noise over the OS base pattern;
-    # set to True to replace pixels with hash(seed, idx) instead.
-    "zoom.stealth.canvas.substitute_pixels":              False,
+    # Canvas substitution (Option B for canvas) — replace pixels with hash(seed,idx),
+    # uniform-skip (red-box exact, masking-safe) + full overwrite. Makes the canvas
+    # render a pure function of (seed) = HOST-INDEPENDENT (kills the DWrite-vs-FreeType
+    # text-raster leak: Canvas Hash + Font hash were the residual Win!=Linux signals).
+    # ON by default (paired with webgl.substitute_pixels).
+    "zoom.stealth.canvas.substitute_pixels":              True,
+
+    # WebGL substitution (Option B) — replace readback/snapshot RGB with
+    # hash(seed,idx), endpoint-preserving. Makes the WebGL render hash a pure
+    # function of (seed, dims) = HOST-INDEPENDENT, so no per-host hw_seed
+    # calibration is needed (the gamma path was per-host: NVIDIA/Arc-on-Win clean
+    # seeds went dirty on the Linux GL backend). ON by default.
+    "zoom.stealth.webgl.substitute_pixels":              True,
+
+    # WebGPU presence consistency. Firefox enables dom.webgpu.enabled by default on
+    # Windows/Mac-ARM but NOT on Linux/Mac-x64. We ALWAYS claim Windows, so force it ON
+    # on every host: a Windows FF MUST expose navigator.gpu (object); a Linux host leaving
+    # it undefined while the UA says Windows is an inconsistency tell (RE 2026-06-22:
+    # has_gpu was object on Win, undefined on WSL). adapter.info is empty (FF privacy
+    # default) so no GPU-name leak; requestAdapter may be null on a GPU-less host, which
+    # is itself plausible for a real Windows machine.
+    "dom.webgpu.enabled":                                 True,
+
+    # Audio fingerprint noise OFF. RE 2026-06-22: the per-session OfflineAudioContext
+    # noise (gated by hw_seed) was THE dominant driver of FP Pro tampering_ml on Windows
+    # — b005 Win dropped 0.4349 -> 0.0564 with audio noise alone disabled (canvas_text/
+    # emoji unchanged, so they were a red-herring). The audio value is already host-indep
+    # AND identical to a real FF's canonical OfflineAudioContext sum, so a fixed (un-noised)
+    # audio is NOT a linking signal (every real FF has the same value) — removing the noise
+    # matches real Firefox and clears the tampering flag.
+    "zoom.stealth.audio.fp_noise":                        False,
 
     # Navigator identity (locked to Windows Firefox 150).
     **_NAVIGATOR_OVERRIDES,
@@ -452,59 +447,17 @@ _WIN_VIRT_DESKTOP_WORKAROUNDS: Dict[str, Any] = {
 # ──────────────────────────────────────────────────────────────────────
 
 def _accept_language(locale: str) -> str:
+    # "<locale>, <base>" — the desktop-default shape (e.g. "en-US, en"). Firefox expands it
+    # to navigator.languages=["en-US","en"] AND (via the patched binary) the q-valued header
+    # "en-US,en;q=0.5". The patched nsHttpHandler (STEALTHFOX, RE 2026-06-23) builds the
+    # Accept-Language header from THIS pref even when juggler sets a per-context locale
+    # override, so header and navigator.languages stay consistent 2/2 — the most authentic
+    # (real desktop) form. Supersedes the 2026-06-22 single-tag workaround.
     lang = locale.replace("_", "-")
     base = lang.split("-")[0]
     return f"{lang}, {base}" if base != lang else lang
 
 
-def _font_metrics_for_platform(profile_metrics: str) -> str:
-    """Return ``zoom.stealth.font.metrics`` value.
-
-    The C++ whitelist hook (``gfxPlatformFontList::FindAndAddFamiliesLocked``)
-    backs EVERY whitelisted *named* family with the list-head family on every
-    platform. Without per-font width factors, that means each named font
-    (Arial, Times New Roman, Courier New, …) renders with identical glyphs and
-    collapses to a SINGLE canvas ``measureText`` width — a non-physical
-    1-distinct-width result that strict JS-sensor anti-bots flag via their
-    font probe. The per-font factors in ``profile_metrics``
-    (``arial|0.978,arial black|1.168,…``) spread the fabricated families back
-    to distinct, realistic, deterministic-per-seed widths, so we apply them on
-    EVERY platform (previously suppressed on Windows/mac, which left the
-    collapse in place — only the CSS-generic vector, which FP Pro probes, was
-    ever correct there).
-
-    These factors only key *named* families. CSS generics
-    (serif/sans-serif/monospace/system-ui) bypass the whitelist entirely and
-    render at the host's native widths, so they are never present in
-    ``profile_metrics`` and stay unfactored — FP Pro's ``font_preferences``
-    probe (which measures the generics) is unaffected. That is also why
-    applying named-font factors here does NOT distort the canonical generic
-    widths.
-
-    Linux ADDITIONALLY needs generic-family compensation
-    (``_LINUX_GENERIC_FONT_FACTORS``) because DejaVu/Liberation generics render
-    wider/narrower than the Windows widths the spoofed profile claims; on
-    Windows/mac the generics already render native, so no generic compensation
-    is applied — only the named-font factors.
-    """
-    if not profile_metrics:
-        return ""
-    # profile_metrics arrives as "name|<universal_real_width>,..." (host-independent
-    # absolute widths, e.g. "arial|2256.7"). We pass them through UNCHANGED: the C++
-    # hook treats a value >= 10 as an ABSOLUTE target measureText width and divides it
-    # by the host's own collapse base (self-calibrating), so the SAME value yields the
-    # exact Windows width on Windows, Linux AND macOS. No per-OS division here.
-    metrics = profile_metrics
-    # Linux ADDITIONALLY needs CSS-generic compensation (DejaVu/Liberation generics
-    # render wider/narrower than Windows). These are multiplicative FACTORS (< 10),
-    # calibrated to FP Pro's font_preferences probe; the C++ hook treats values < 10 as
-    # factors. Generics bypass the whitelist/collapse so they are NOT self-calibrated.
-    # Windows/mac generics render native -> no compensation.
-    if sys.platform.startswith("linux"):
-        return _LINUX_GENERIC_FONT_FACTORS + metrics
-    return metrics
-
-
 def translate_profile_to_prefs(
     profile: Profile,
     *,
@@ -606,15 +559,37 @@ def translate_profile_to_prefs(
     prefs["media.mediasource.webm.enabled"]   = profile.codec.mediasource_webm
     prefs["media.mediasource.mp4.enabled"]    = profile.codec.mediasource_mp4
 
-    # Fonts
-    prefs["zoom.stealth.font.whitelist"] = ",".join(profile.fonts)
-    prefs["zoom.stealth.font.metrics"]   = _font_metrics_for_platform(
-        profile._raw.get("font_metrics", "") or ""
-    )
-    # Reference string the binary sums the collapsed font's advances over to
-    # self-calibrate the per-host collapse base (turns the absolute widths in
-    # `metrics` into the right factor on any OS). See _font_metrics_for_platform.
-    prefs["zoom.stealth.font.calib_ref"] = _FONT_CALIB_REF
+    # Fonts — real bundled fonts (no collapse). The binary ships the real
+    # Windows font files in <GRE>/fonts and loads them via MOZ_BUNDLED_FONTS, so
+    # glyphs are genuine on every host. We expose this profile's family set via
+    # the per-profile fontlist, which the binary applies to the native system
+    # font allow-list AT CONSTRUCTION (no runtime rebuild → no scan stall), and
+    # force the system-ui generic to Segoe UI. profile.fonts is the _fpforge
+    # sample (core always + a conditioned optional subset). Per-profile metric
+    # uniqueness comes from the shared fpp.hw_seed jitter in the HarfBuzz shaper
+    # (set with the other fpp prefs), not from fabricated widths.
+    prefs["zoom.stealth.font.fontlist"] = ",".join(profile.fonts)
+    prefs["zoom.stealth.font.system_ui"] = "Segoe UI"
+
+    # Activate the bundled real-Windows fonts (MOZ_BUNDLED_FONTS / <GRE>/fonts).
+    prefs["gfx.bundled-fonts.activate"] = 1
+    # Point the CSS generics at Windows defaults. On a Windows HOST Firefox's
+    # built-in name-lists already resolve to these (and they're in the fontlist
+    # so they survive the allow-list); but on a non-Windows host (Linux/Mac) the
+    # built-in defaults name host fonts (DejaVu/Liberation/…) which the allow-list
+    # hides — so the generics would collapse. Setting them explicitly keeps the
+    # generics resolving to the bundled Windows families on EVERY host (system-ui
+    # is forced to Segoe UI by the C++ hook above, so it is not listed here).
+    prefs["font.name-list.serif.x-western"] = "Times New Roman"
+    prefs["font.name-list.sans-serif.x-western"] = "Arial"
+    prefs["font.name-list.monospace.x-western"] = "Consolas"
+    prefs["font.name-list.sans-serif.ja"] = "Yu Gothic UI"
+    prefs["font.name-list.serif.ja"] = "Yu Gothic UI"
+    prefs["font.name-list.sans-serif.ko"] = "Malgun Gothic"
+    prefs["font.name-list.serif.ko"] = "Malgun Gothic"
+    prefs["font.name-list.sans-serif.zh-CN"] = "Microsoft YaHei UI"
+    prefs["font.name-list.sans-serif.zh-TW"] = "Microsoft JhengHei UI"
+    prefs["font.name-list.sans-serif.zh-HK"] = "Microsoft JhengHei UI"
 
     # UI / dark mode + Windows colors palette (only when light theme).
     prefs["ui.systemUsesDarkTheme"] = int(profile.dark_theme)
@@ -628,6 +603,15 @@ def translate_profile_to_prefs(
     prefs["general.useragent.locale"]  = lang
     prefs["intl.locale.requested"]     = lang
     prefs["privacy.spoof_english"]     = 0
+    # juggler.locale.override seeds the BrowsingContext LanguageOverride FIELD in
+    # the parent process (BrowsingContext::Attach), whose DidSet drives BOTH
+    # navigator.languages (the full list) AND the realm Intl default locale (the
+    # primary tag it extracts) — so Intl.DateTimeFormat / NumberFormat /
+    # toLocaleString follow the locale, not just the Accept-Language header. Seed
+    # it with the full Accept-Language list so navigator.languages stays the
+    # desktop-default 2 elements (["fr-FR","fr"]); the C++ DidSet takes "fr-FR"
+    # for Intl. Mirrors juggler.timezone.override; the SOLE source of truth.
+    prefs["juggler.locale.override"]   = _accept_language(locale)
 
     if timezone:
         # juggler.timezone.override is the SOLE source of truth read by the C++
diff --git a/tests/test_canvas_render_stealth.py b/tests/test_canvas_render_stealth.py
index e0c7ba1..838401a 100644
--- a/tests/test_canvas_render_stealth.py
+++ b/tests/test_canvas_render_stealth.py
@@ -1,19 +1,17 @@
-"""Canvas / WebGL render-stealth regression tests (binary-level, 2026-06-18).
+"""Canvas / WebGL render-stealth regression test (binary-level, 2026-06-18).
 
-Two patched-binary behaviours that must never regress, both needed for the
+Guards a patched-binary behaviour that must never regress, needed for the
 fingerprint to look like a real Windows browser to FOSS detectors (CreepJS,
-FingerprintJS, BrowserLeaks) and to image-dedup font probes / fixed-hash
-reference checks:
+FingerprintJS, BrowserLeaks) and fixed-hash reference checks:
 
-  1. Per-font canvas distinctness — whitelisted named fonts are backed by the
-     host list-head glyphs (so measureText widths are host-independent), but each
-     must still rasterise to a DISTINCT image at tiny probe sizes. Otherwise an
-     image-dedup font probe collapses them to ~1 name and the reported font set
-     looks fabricated. (C++: per-font sub-pixel draw offset in DrawText.)
-  2. Solid WebGL readback purity under render-noise — a fixed solid-colour WebGL
-     readback (which reference checks hash against a universal constant) must stay
-     byte-exact even with per-seed render-noise enabled, while high-entropy
-     renders stay noised. (C++: render-noise skips near-uniform WebGL readbacks.)
+  Solid WebGL readback purity under render-noise — a fixed solid-colour WebGL
+  readback (which reference checks hash against a universal constant) must stay
+  byte-exact even with per-seed render-noise enabled, while high-entropy
+  renders stay noised. (C++: render-noise skips near-uniform WebGL readbacks.)
+
+(Per-font canvas distinctness is no longer guarded here: the font-collapse +
+per-font draw offset were removed on 2026-06-20 in favour of real bundled
+Windows fonts, which rasterise to distinct images by nature.)
 
 Runs against about:blank, no network/proxy. Part of the e2e release gate.
 Run: pytest tests/test_canvas_render_stealth.py -m e2e -v
@@ -23,34 +21,6 @@ from __future__ import annotations
 import pytest
 
 from invisible_playwright import InvisiblePlaywright
-from invisible_playwright import prefs as _prefs
-from invisible_playwright._fpforge import generate_profile
-
-# Diverse-codepoint probe string — maximises per-font rendering differences, the
-# way an image-dedup font probe drives a tiny canvas.
-_PROBE = ("\U0001f6cd1>'`amlρiюदे來˦"
-          "\U00025578に◌\U0002003eԩԨ")
-
-
-def _named_fonts(limit: int = 30) -> list[str]:
-    """The whitelisted NAMED fonts (absolute collapse-target width >= 10) for the
-    test seed — these are the ones the per-font offset must keep distinct."""
-    prof = generate_profile(42)
-    metrics = _prefs._font_metrics_for_platform(prof._raw.get("font_metrics", "") or "")
-    out: list[str] = []
-    for ent in metrics.split(","):
-        name, _, val = ent.partition("|")
-        if not val:
-            continue
-        try:
-            if float(val.replace("px", "")) >= 10.0:
-                out.append(name)
-        except ValueError:
-            pass
-    return out[:limit]
-
-
-_FONTS = _named_fonts()
 
 
 @pytest.fixture(scope="module")
@@ -68,34 +38,6 @@ def noised_page(firefox_binary):
         yield p
 
 
-@pytest.mark.e2e
-def test_named_fonts_render_distinct_canvas_images(noised_page):
-    """Each whitelisted named font must produce a DISTINCT tiny-canvas image so an
-    image-dedup font probe keeps every name. Regression: without the per-font draw
-    offset all whitelisted fonts share the list-head glyphs -> ~1-2 distinct
-    images -> degenerate detected-font set."""
-    assert len(_FONTS) >= 10, "expected a non-trivial named-font whitelist to probe"
-    distinct = noised_page.evaluate(
-        """(args) => {
-            const [fonts, V] = args;
-            const c = document.createElement('canvas'); c.width = 90; c.height = 12;
-            const d = c.getContext('2d'); d.fillStyle = 'red';
-            const seen = new Set();
-            for (const f of fonts) {
-                d.clearRect(0, 0, 90, 12);
-                d.font = 'normal 4px "' + f + '"';
-                d.fillText(V, 5, 8);
-                seen.add(c.toDataURL());
-            }
-            return seen.size;
-        }""",
-        [_FONTS, _PROBE],
-    )
-    # broken (offset removed) collapses to ~1-2; require nearly all distinct.
-    assert distinct >= len(_FONTS) - 2, \
-        f"only {distinct}/{len(_FONTS)} distinct font images (per-font offset regressed?)"
-
-
 @pytest.mark.e2e
 def test_solid_webgl_readback_stays_pure_under_noise(noised_page):
     """A solid-colour WebGL readback must remain byte-exact (only {0,255}) with
diff --git a/tests/test_integration.py b/tests/test_integration.py
index 4ba29c2..3e4ad81 100644
--- a/tests/test_integration.py
+++ b/tests/test_integration.py
@@ -42,8 +42,8 @@ _REQUIRED_PREFS_KEYS = (
     "media.encoder.webm.enabled",
     "media.mediasource.webm.enabled",
     "media.mediasource.mp4.enabled",
-    "zoom.stealth.font.whitelist",
-    "zoom.stealth.font.metrics",
+    "zoom.stealth.font.fontlist",
+    "zoom.stealth.font.system_ui",
     "ui.systemUsesDarkTheme",
     "intl.accept_languages",
     "general.useragent.locale",
@@ -197,23 +197,26 @@ def test_http_proxy_returned_unchanged_no_socks_mutations():
 
 
 # ──────────────────────────────────────────────────────────────────────
-#  IT7: profile.fonts reaches prefs as a comma-joined whitelist
+#  IT7: profile.fonts reaches prefs as a comma-joined fontlist
 # ──────────────────────────────────────────────────────────────────────
 
 
 @pytest.mark.integration
-def test_profile_fonts_propagate_to_prefs_whitelist():
+def test_profile_fonts_propagate_to_prefs_fontlist():
     """IT7 — every font in ``profile.fonts`` appears in the comma-joined
-    ``zoom.stealth.font.whitelist`` pref, in order."""
+    ``zoom.stealth.font.fontlist`` pref, in order. The binary applies this
+    list to the native system font allow-list at construction; system-ui is
+    forced to Segoe UI."""
     profile = generate_profile(seed=42)
     prefs = translate_profile_to_prefs(profile)
 
     assert profile.fonts, "fixture seed=42 produced empty fonts list"
-    whitelist = prefs["zoom.stealth.font.whitelist"]
-    assert isinstance(whitelist, str)
-    assert whitelist == ",".join(profile.fonts)
+    fontlist = prefs["zoom.stealth.font.fontlist"]
+    assert isinstance(fontlist, str)
+    assert fontlist == ",".join(profile.fonts)
     for font in profile.fonts:
-        assert font in whitelist
+        assert font in fontlist
+    assert prefs["zoom.stealth.font.system_ui"] == "Segoe UI"
 
 
 # ──────────────────────────────────────────────────────────────────────
@@ -357,23 +360,3 @@ def test_linux_msaa_pin_propagates_through_pipeline(monkeypatch):
     assert prefs["webgl.msaa-force"] is True
 
 
-# ──────────────────────────────────────────────────────────────────────
-#  IT13 (extra): Linux font metrics receive the GTK/DejaVu compensation
-#  block. End-to-end check that ``_LINUX_GENERIC_FONT_FACTORS`` is
-#  prepended to the per-font metrics string sampled from the profile.
-# ──────────────────────────────────────────────────────────────────────
-
-
-@pytest.mark.integration
-def test_linux_font_metrics_include_generic_factors(monkeypatch):
-    """IT13 — on Linux the font metrics pref starts with the generic
-    width-scale factors (GTK/DejaVu compensation) so glyph widths match
-    Windows. Without this, Linux sessions leak via metric drift."""
-    from invisible_playwright.prefs import _LINUX_GENERIC_FONT_FACTORS
-
-    monkeypatch.setattr(sys, "platform", "linux")
-    profile = generate_profile(seed=42)
-    prefs = translate_profile_to_prefs(profile)
-
-    metrics = prefs["zoom.stealth.font.metrics"]
-    assert metrics.startswith(_LINUX_GENERIC_FONT_FACTORS)
diff --git a/tests/test_launcher_helpers.py b/tests/test_launcher_helpers.py
index 590736a..1847001 100644
--- a/tests/test_launcher_helpers.py
+++ b/tests/test_launcher_helpers.py
@@ -181,7 +181,7 @@ def test_default_context_omits_locale_when_empty():
 def test_build_env_injects_webrtc_egress_when_discovered():
     ip = InvisiblePlaywright(seed=42)
     ip._webrtc_egress_ip = "203.0.113.9"  # what __enter__ resolves behind a proxy
-    env = ip._build_env()
+    env = ip._build_env({})
     assert env["STEALTHFOX_WEBRTC_PUBLIC_IP"] == "203.0.113.9"
     assert env["STEALTHFOX_WEBRTC_DISABLE_IPV6"] == "1"
 
@@ -191,7 +191,7 @@ def test_build_env_no_webrtc_keys_without_proxy(monkeypatch):
     monkeypatch.delenv("STEALTHFOX_WEBRTC_PUBLIC_IP", raising=False)
     ip = InvisiblePlaywright(seed=42)
     ip._webrtc_egress_ip = None  # no proxy → real STUN already truthful
-    env = ip._build_env()
+    env = ip._build_env({})
     assert "STEALTHFOX_WEBRTC_PUBLIC_IP" not in env
     assert "STEALTHFOX_WEBRTC_DISABLE_IPV6" not in env
 
@@ -201,6 +201,29 @@ def test_build_env_caller_env_override_wins(monkeypatch):
     monkeypatch.setenv("STEALTHFOX_WEBRTC_PUBLIC_IP", "198.51.100.5")
     ip = InvisiblePlaywright(seed=42)
     ip._webrtc_egress_ip = "203.0.113.9"  # auto-discovered
-    env = ip._build_env()
+    env = ip._build_env({})
     assert env["STEALTHFOX_WEBRTC_PUBLIC_IP"] == "198.51.100.5"  # caller wins
     assert env["STEALTHFOX_WEBRTC_DISABLE_IPV6"] == "1"
+
+
+@pytest.mark.unit
+def test_build_env_injects_font_list_and_system_ui():
+    # The binary reads these at the gfxPlatformFontList constructor (process
+    # start); Playwright delivers firefox_user_prefs over juggler AFTER start, so
+    # the env var is the only at-construction channel. Without it host fonts leak
+    # on Linux/macOS (the wrapper's pref-only delivery was a cross-OS gap).
+    ip = InvisiblePlaywright(seed=42)
+    env = ip._build_env({
+        "zoom.stealth.font.fontlist": "arial,calibri,segoe ui",
+        "zoom.stealth.font.system_ui": "Segoe UI",
+    })
+    assert env["STEALTHFOX_FONTLIST"] == "arial,calibri,segoe ui"
+    assert env["STEALTHFOX_SYSTEMUI"] == "Segoe UI"
+
+
+@pytest.mark.unit
+def test_build_env_no_font_keys_when_absent():
+    ip = InvisiblePlaywright(seed=42)
+    env = ip._build_env({})
+    assert "STEALTHFOX_FONTLIST" not in env
+    assert "STEALTHFOX_SYSTEMUI" not in env
diff --git a/tests/test_prefs.py b/tests/test_prefs.py
index 609841b..2cec2c2 100644
--- a/tests/test_prefs.py
+++ b/tests/test_prefs.py
@@ -5,9 +5,7 @@ import pytest
 
 from invisible_playwright._fpforge import generate_profile
 from invisible_playwright.prefs import (
-    _LINUX_GENERIC_FONT_FACTORS,
     _accept_language,
-    _font_metrics_for_platform,
     _WIN_LIGHT_COLORS,
     translate_profile_to_prefs,
 )
@@ -82,29 +80,6 @@ def test_accept_language_underscore_normalized():
     assert _accept_language("pt_BR") == "pt-BR, pt"
 
 
-# ──────────────────────────────────────────────────────────────────────
-#  _font_metrics_for_platform
-# ──────────────────────────────────────────────────────────────────────
-
-
-@pytest.mark.unit
-def test_font_metrics_windows_applies_named_factors(monkeypatch):
-    # FM2: Windows/mac apply the per-NAMED-font factors (so whitelisted named
-    # families don't collapse to the list-head width on the canvas measureText
-    # path), but WITHOUT the Linux generic-family compensation (generics bypass
-    # the whitelist and render native there).
-    monkeypatch.setattr(sys, "platform", "win32")
-    out = _font_metrics_for_platform("Arial|1.0,Verdana|0.9,")
-    assert out == "Arial|1.0,Verdana|0.9,"
-    assert "sans-serif|" not in out  # no generic compensation on Windows
-
-
-@pytest.mark.unit
-def test_font_metrics_empty_input_returns_empty():
-    # FM3: Empty input always returns "" regardless of platform.
-    assert _font_metrics_for_platform("") == ""
-
-
 # ──────────────────────────────────────────────────────────────────────
 #  Platform-specific GPU / MSAA (Windows)
 # ──────────────────────────────────────────────────────────────────────
@@ -385,34 +360,6 @@ def test_lan_ip_seed_zero_has_no_zero_octets():
 # ──────────────────────────────────────────────────────────────────────
 
 
-@pytest.mark.unit
-def test_font_metrics_linux_prepends_generic_factors(monkeypatch):
-    # FM1: Linux prepends the GTK/DejaVu compensation block to the
-    # per-font metrics string sampled from the profile.
-    monkeypatch.setattr(sys, "platform", "linux")
-    out = _font_metrics_for_platform("Arial|1.0,Verdana|0.9,")
-    assert out.startswith(_LINUX_GENERIC_FONT_FACTORS)
-    assert out.endswith("Arial|1.0,Verdana|0.9,")
-
-
-@pytest.mark.unit
-def test_font_metrics_linux_empty_input_returns_empty(monkeypatch):
-    # FM1b: even on Linux, empty profile metrics short-circuits before
-    # the prepend so we never emit a metrics pref containing only the
-    # generic block (which would surface as a tampering signal).
-    monkeypatch.setattr(sys, "platform", "linux")
-    assert _font_metrics_for_platform("") == ""
-
-
-@pytest.mark.unit
-def test_font_metrics_linux2_variant_uses_linux_branch(monkeypatch):
-    # FM1c: ``sys.platform`` can be ``linux2`` on older Pythons / odd
-    # WSL builds. ``startswith("linux")`` accepts both.
-    monkeypatch.setattr(sys, "platform", "linux2")
-    out = _font_metrics_for_platform("Verdana|0.9,")
-    assert out.startswith(_LINUX_GENERIC_FONT_FACTORS)
-
-
 @pytest.mark.unit
 def test_gpu_renderer_set_from_profile_on_linux(monkeypatch):
     # PG1: on Linux (as on EVERY host) we apply the camoufox-derived Windows-ANGLE GPU persona,
diff --git a/tests/test_sampler.py b/tests/test_sampler.py
index b201c7f..e9af219 100644
--- a/tests/test_sampler.py
+++ b/tests/test_sampler.py
@@ -216,12 +216,15 @@ def test_screen_tier_4200x2000_is_ultrawide_via_width_branch():
 # ── derive_font_prefs / derive_font_whitelist ───────────────────────────
 
 @pytest.mark.unit
-def test_derive_font_prefs_returns_whitelist_and_metrics_keys():
-    """FP1 [HAPPY]: result has the two expected string keys."""
+def test_derive_font_prefs_returns_whitelist_key():
+    """FP1 [HAPPY]: result is a single-key dict with the font family list.
+
+    The per-family ``metrics`` string was removed on 2026-06-20: fonts now
+    render from the bundled real Windows files (genuine widths) and per-session
+    metric uniqueness comes from the HarfBuzz jitter, not fabricated factors."""
     out = derive_font_prefs("integrated_modern", random.Random(42))
-    assert set(out.keys()) == {"whitelist", "metrics"}
+    assert set(out.keys()) == {"whitelist"}
     assert isinstance(out["whitelist"], str)
-    assert isinstance(out["metrics"], str)
 
 
 @pytest.mark.unit
@@ -249,15 +252,6 @@ def test_derive_font_prefs_unknown_class_falls_back_to_integrated_modern():
     assert fallback == expected
 
 
-@pytest.mark.unit
-def test_derive_font_prefs_metrics_and_whitelist_are_coherent():
-    """FP5 [ECP]: every name in whitelist has a metrics entry and vice versa."""
-    out = derive_font_prefs("mid_range", random.Random(99))
-    wl_names = out["whitelist"].split(",")
-    metrics_names = [s.split("|", 1)[0] for s in out["metrics"].split(",")]
-    assert wl_names == metrics_names
-
-
 @pytest.mark.unit
 def test_derive_font_prefs_whitelist_alphabetically_sorted():
     """FP6 [ECP]: whitelist names are sorted (ordering invariant for stable dedup)."""
@@ -280,10 +274,12 @@ def test_derive_font_whitelist_legacy_shim_matches_dict_form():
 # machine never lacks them, so a session that drops one advertises a font set that
 # doesn't match any real Windows profile (image-dedup font probes then report a
 # short/degenerate name list → server-side OS-font-set checks fail). Calibri in
-# particular sat in `optional` (a bug); these five caused the detected set to come
-# up short on some seeds. Regression guard for the 2026-06-18 optional→core move.
+# particular sat in `optional` (a bug); these caused the detected set to come up
+# short on some seeds. Regression guard for the 2026-06-18 optional→core move.
+# NB: the exact Win11 family is "franklin gothic medium" (there is no bare
+# "franklin gothic" family); the 2026-06-20 bundle reconciliation uses real names.
 _STANDARD_WINDOWS_FONTS = [
-    "calibri", "franklin gothic", "gadugi", "javanese text", "myanmar text",
+    "calibri", "franklin gothic medium", "gadugi", "javanese text", "myanmar text",
 ]
 _ALL_GPU_CLASSES = [
     "integrated_old", "integrated_modern", "mid_range", "high_end",
@@ -294,16 +290,14 @@ _ALL_GPU_CLASSES = [
 @pytest.mark.unit
 @pytest.mark.parametrize("gpu_class", _ALL_GPU_CLASSES)
 def test_standard_windows_fonts_always_present_every_class_and_seed(gpu_class):
-    """FP7 [regression]: the standard-Windows fonts appear in BOTH whitelist and
-    metrics for every gpu_class across many seeds (i.e. they are core, not
-    profile-optional). Guards against a standard font silently becoming optional."""
+    """FP7 [regression]: the standard-Windows fonts appear in the whitelist for
+    every gpu_class across many seeds (i.e. they are core, not profile-optional).
+    Guards against a standard font silently becoming optional."""
     for seed in range(40):
         out = derive_font_prefs(gpu_class, random.Random(seed))
         wl = set(out["whitelist"].split(","))
-        metrics_names = {s.split("|", 1)[0] for s in out["metrics"].split(",")}
         for font in _STANDARD_WINDOWS_FONTS:
             assert font in wl, f"{font!r} missing from whitelist (class={gpu_class}, seed={seed})"
-            assert font in metrics_names, f"{font!r} missing from metrics (class={gpu_class}, seed={seed})"
 
 
 @pytest.mark.unit
@@ -320,33 +314,13 @@ def test_standard_windows_fonts_are_in_core_pool():
 @pytest.mark.unit
 @pytest.mark.parametrize("gpu_class", _ALL_GPU_CLASSES)
 def test_derive_font_prefs_no_duplicate_families(gpu_class):
-    """FP9 [regression]: no family appears twice in whitelist/metrics, even when a
+    """FP9 [regression]: no family appears twice in the whitelist, even when a
     profile's optional list also names a core font. Guards the dedup in
-    derive_font_prefs (a duplicate family would emit a malformed pref pair)."""
+    derive_font_prefs (a duplicate family would emit a malformed list)."""
     for seed in range(30):
         out = derive_font_prefs(gpu_class, random.Random(seed))
         wl = out["whitelist"].split(",")
-        metrics_names = [s.split("|", 1)[0] for s in out["metrics"].split(",")]
         assert len(wl) == len(set(wl)), f"duplicate in whitelist (class={gpu_class}, seed={seed})"
-        assert len(metrics_names) == len(set(metrics_names)), \
-            f"duplicate in metrics (class={gpu_class}, seed={seed})"
-
-
-@pytest.mark.unit
-@pytest.mark.parametrize("gpu_class", _ALL_GPU_CLASSES)
-def test_derive_font_prefs_named_fonts_emit_absolute_widths(gpu_class):
-    """FP10 [regression]: every emitted metrics value is a positive number; named
-    (non-generic) fonts carry an ABSOLUTE collapse-target width (>= 10), which the
-    binary self-calibrates per host. A value < 10 here would mean a font slipped
-    through as a bare multiplicative factor and would render at the wrong width."""
-    out = derive_font_prefs(gpu_class, random.Random(3))
-    for entry in out["metrics"].split(","):
-        name, _, val = entry.partition("|")
-        v = float(val.replace("px", ""))
-        assert v > 0.0, f"non-positive metrics value for {name!r}"
-        # the standard named fonts must be absolute (collapse-target) widths
-        if name in _STANDARD_WINDOWS_FONTS:
-            assert v >= 10.0, f"{name!r} emitted as factor {v} (<10), expected absolute width"
 
 
 # ── Forge / sample ──────────────────────────────────────────────────────
@@ -364,7 +338,7 @@ _EXPECTED_KEYS = {
     "av1_enabled", "webm_encoder_enabled",
     "mediasource_webm", "mediasource_mp4", "webspeech_synth",
     "storage_quota_mb", "dark_theme",
-    "font_whitelist", "font_metrics",
+    "font_whitelist",
 }
 
 
@@ -453,10 +427,9 @@ def test_forge_sample_avail_h_defaults_to_h_minus_40_when_missing(monkeypatch):
 
 @pytest.mark.unit
 def test_forge_sample_includes_font_keys():
-    """FS9 [ECP]: font_whitelist + font_metrics present and non-empty."""
+    """FS9 [ECP]: font_whitelist present and non-empty (the joined family list)."""
     out = sample(42)
     assert out["font_whitelist"]
-    assert out["font_metrics"]
     assert "," in out["font_whitelist"]    # at least the core fonts joined