diff --git a/CHANGELOG.md b/CHANGELOG.md
index 75e40d1..1cf9ef9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,27 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 
 ## [Unreleased]
 
+## [0.1.3] - 2026-05-19
+
+### Changed
+- `BINARY_VERSION` bumped from `firefox-2` to `firefox-3`. The new archives on both Windows and Linux are built from a clean clone of [feder-cr/invisible-firefox#stealth/150](https://github.com/feder-cr/invisible-firefox/tree/stealth/150) — the consolidated source-of-truth fork (renamed from `feder-cr/firefox`; the companion `feder-cr/firefox-stealth` patches repo was deleted, all patches now live as commits on top of `mozilla-firefox/firefox`).
+- The patched Firefox archive now ships the **proper C++ implementation** of `windowUtils.jugglerSendMouseEvent`, replacing the JS shim from 0.1.2.
+
+### C++ fixes landed in this release
+- **C1+C2**: `setDownloadInterceptor` IDL + cpp (re-landed for FF150).
+- **C4**: 5 `nsIDocShell` stealth attributes (`fileInputInterceptionEnabled`, `overrideHasFocus`, `bypassCSPEnabled`, `forceActiveState`, `disallowBFCache`).
+- **C5**: `LauncherProcessWin.cpp` + `nsWindowsWMain.cpp` juggler-pipe handle inheritance — without this, the Playwright pipe disconnects immediately on launch.
+- **C6**: `juggler-navigation-started-renderer` / `-browser` observer notifications in `nsDocShell.cpp` and `CanonicalBrowsingContext.cpp` — without these, `Page.ready` never fires and `ctx.new_page()` hangs.
+- **C7 (partial)**: storage stub for `nsIDocShell.languageOverride`. Workaround `InvisiblePlaywright(locale="")` recommended until full BC FIELD port lands.
+
+### Verified
+- Both archives built from same source: feder-cr/invisible-firefox commit `68906f1f9c55`.
+- Windows + Linux smoke suite green: launch, `ctx.new_page()`, `page.mouse.{move,down,up,click,wheel}`, `navigator.webdriver=false`, sannysoft 32/33 PASS.
+- SHA256 published in `checksums.txt` on the `firefox-3` release.
+
+### Notes
+- This is the first release with a native Linux build of the patched binary (previous `firefox-3` draft mentioned shipping the Linux firefox-2 archive byte-for-byte; that no longer applies — Linux now has the full C++ patch series).
+
 ## [0.1.2] - 2026-05-18
 
 ### Changed
diff --git a/src/invisible_playwright/constants.py b/src/invisible_playwright/constants.py
index bb26df3..eef17b0 100644
--- a/src/invisible_playwright/constants.py
+++ b/src/invisible_playwright/constants.py
@@ -7,7 +7,7 @@ bugfixes don't force a multi-hour Firefox rebuild.
 from __future__ import annotations
 
 # Bump this when a new patched Firefox build is released on GitHub.
-BINARY_VERSION: str = "firefox-2"
+BINARY_VERSION: str = "firefox-3"
 
 # Underlying Firefox version (for display only; does not drive downloads).
 FIREFOX_UPSTREAM_VERSION: str = "150.0.1"