feat: initial public release

Stealthfox — a patched Firefox 150.0.1 for browser-fingerprint stealth,
shipped as a Playwright-compatible Python wrapper.

  * Sync + async Stealthfox launcher (firefox_user_prefs, virtual desktop
    on Windows, SOCKS5 auth via patched nsProtocolProxyService)
  * fpforge: Bayesian fingerprint sampler over GPU / audio / fonts /
    screen / TCP options / ~400 other navigator fields
  * WebRTC stealth: srflx address swap, synthetic srflx fallback,
    private-LAN host candidates — no real public IP leak via STUN
  * GPU sandbox fix for FF150 alt-desktop regression
  * Bezier-curve mouse motion baked into Juggler

Targets Windows x86_64 + Linux x86_64. Binary fetched on first run from
GitHub Release "firefox-1".

tests/test_prefs.py

@@ -0,0 +1,35 @@
+from stealthfox._fpforge import generate_profile
+from stealthfox.prefs import translate_profile_to_prefs
+
+
+def test_translate_includes_gpu_renderer():
+    p = generate_profile(seed=42)
+    prefs = translate_profile_to_prefs(p)
+    assert prefs["zoom.stealth.webgl.renderer"] == p.gpu.renderer
+    assert prefs["zoom.stealth.webgl.vendor"] == p.gpu.vendor
+
+
+def test_translate_includes_screen():
+    p = generate_profile(seed=42)
+    prefs = translate_profile_to_prefs(p)
+    assert prefs["zoom.stealth.screen.width"] == p.screen.width
+    assert prefs["zoom.stealth.screen.height"] == p.screen.height
+
+
+def test_translate_is_deterministic_per_seed():
+    a = translate_profile_to_prefs(generate_profile(seed=42))
+    b = translate_profile_to_prefs(generate_profile(seed=42))
+    assert a == b
+
+
+def test_translate_varies_across_seeds():
+    a = translate_profile_to_prefs(generate_profile(seed=1))
+    b = translate_profile_to_prefs(generate_profile(seed=2))
+    assert a != b
+
+
+def test_translate_has_stealth_baseline_constants():
+    p = generate_profile(seed=42)
+    prefs = translate_profile_to_prefs(p)
+    assert prefs.get("privacy.resistFingerprinting") is False
+    assert "media.peerconnection.enabled" in prefs