r3dfox is a fork of the open source web browser Mozilla Firefox made specifically for Windows Vista, 7, and 8 compatibility.
Limited compatibility with One Core API on Windows XP is offered at the current time, however this is not tested consistently. Any issues that may arise that are hard to diagnose may be left to the extended kernel provider to fix.
Local (GitHub) Downloads:
SourceForge Downloads:
New default theme and color scheme!
More native and native like elements, scrollbar, checkboxes, radio buttons, tooltips, and more! Better than the 115 ESR patch!
Aero Glass or accent color on 8/10+!
Ability to use modern (Windows 10) theme on any OS!
Full portable mode that doesn't touch AppData at all!
Classic about:config page!
Less telemetry than regular Firefox!
No background tasks!
Easier to notice red retry button for failed downloads!
JPEG XL support!
GPU/hardware acceleration in VMware Workstation 16 and above!
general.useragent.override.(website) is back!
Instant one off searches!
Ability to disable CSP!
Ability to visit websites on ports that Firefox rejects!
Ability to disable e10s! (Experimental and kinda broken)
If I've forgotten to put your name here, please let me know and I'll add it.
Alex313031 - Mozconfig, general help with the browser, and changes from Mercury browser
aubymori & ephemeralviolette - Classic about:config, disabled launcher process, and more from Nara browser
bbc-chi - Fullscreen transition fix
Erizur - Improved native titlebar and modern mode from Marble browser
Feodor2 - Portable mode and Vista compatibility changes from Mypal68
goodusername123 - Graphical acceleration in VMware Workstation
i486 - Fixed non-native menus
kawapure & ephemeralviolette - Native Controls Patch
leadweedy - Improved active tab indicator from Firefox-Proton-Square
Librewolf Developers - Privacy tweaks from Librewolf
Mozilla Developers - Firefox browser base
newbie-461 - Fixed the installer issues
QNetITQ - WaveFox theme
SashaXser - Improved rustflags opts in mozconfig
Solinus - Branding visuals, icons and fancy text
Tor Browser Developers - Addon fix code from Tor Browser
Unity Pixelheart (UnityAI) - General help with coding and the theme code (Created by @GarryStraitYT)
wanderer - Various code contributions for Vista support
Firefox is a fast, reliable and private web browser from the non-profit Mozilla organization.
To learn how to contribute to Firefox read the Firefox Contributors' Quick Reference document.
We use bugzilla.mozilla.org as our issue tracker, please file bugs there.
- Firefox Source Docs is our primary documentation repository
- Nightly development builds can be downloaded from Firefox Nightly page
If you have a question about developing Firefox, and can't find the solution on Firefox Source Docs, you can try asking your question on Matrix at chat.mozilla.org in the Introduction channel.