feder-cr/invisible_playwright

vfirefox-4 Bugfix

This release fixes issues for SREs watching stability and regressions.

Published 14d API Development

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✓ No known CVEs patched

Read the diff → Tool health → What is this tool? →

✓ No known CVEs patched in this version

Topics

anti-bot anti-detect-browser automation browser-automation browser-fingerprinting captcha

+14 more

captcha-bypass fingerprint fingerprint-spoofing fingerprintjs firefox hcaptcha headless-browser playwright recaptcha recaptcha-bypass scraping socks5 stealth web-scraping

Summary

AI summary

Fixed Page.uncaughtError to include location details, preventing client crashes on uncaught JS errors.

Changes in this release

Type	Severity	Summary	CVE
Feature	Medium	Page.uncaughtError now includes location: {url, lineNumber, columnNumber} field. Page.uncaughtError now includes location: {url, lineNumber, columnNumber} field. Source: granite4.1:8b-q6_K@2026-05-20 Confidence: high	—
Dependency	Medium	Uses invisible_firefox source at commit 1ba55d93051f. Uses invisible_firefox source at commit 1ba55d93051f. Source: granite4.1:8b-q6_K@2026-05-20 Confidence: low	—
Bugfix	Medium	Fixes TypeError when uncaught JS error occurs without location data. Fixes TypeError when uncaught JS error occurs without location data. Source: granite4.1:8b-q6_K@2026-05-20 Confidence: high	—

Full changelog

A stealth-patched Firefox 150.0.1 built from feder-cr/invisible-firefox, branch stealth/150.

Patches spoof the fingerprinting layers that anti-bot systems read — Navigator, Canvas, WebGL, Fonts, Audio, WebRTC, Timezone, DevTools detection — at the C++ source level. The spoofed values come back through the normal Gecko paths; no JavaScript shims.

Use with the invisible_playwright wrapper.

Downloads

Windows: firefox-150.0.1-stealth-win-x86_64.zip (124 MB)
Linux: firefox-150.0.1-stealth-linux-x86_64.tar.gz (113 MB)
SHA-256 sums: checksums.txt

What changed since rev 3

Fix #13: Page.uncaughtError now includes the location: {url, lineNumber, columnNumber} field that newer Playwright clients read strictly. Without it, any page that throws an uncaught JS error (e.g. bunny.net) crashed the client with TypeError: Cannot read properties of undefined (reading 'url'). The fix matches upstream Playwright Juggler (microsoft/playwright@c8604ec, 2026-05-07 roll).

JS-only change — xul.dll and firefox.exe are byte-identical to rev 3; only the Juggler JS files in chrome/juggler/ are updated.