r3dfox or r3dactedfox is a fork of release branch Mozilla Firefox made for Windows Vista, 7, and 8. r3dfox also comes with limited compatibility for Windows XP using One Core API. Included are multiple tweaks from Librewolf, other browsers, and our own tweaks. Our browser even has a custom theme. You can disable any of this at will for a more stock experience if you want to.

Main download link (GitHub)

Alternative download link (SourceForge)

- New default theme and color scheme!
- More native and native like elements, scrollbar, checkboxes, radio buttons, tooltips, and more!
- Windows theme version override, ability to use modern (Windows 10) theme on any OS, or enable (Windows 7) Aero theme on Windows 10!
- Full portable mode that doesn't touch AppData at all!
- Switchable Classic about:config page!
- Less telemetry than regular Firefox! No installer ping and no background tasks!
- Easier to notice red retry button for failed downloads!
- JPEG XL support! Including transparency and animation!
- GPU/hardware acceleration in VMware Workstation 16 and above!
- general.useragent.override.(website) is back!
- Instant one off searches and classic one off search UI!
- Ability to restore classic right click menu items such as view image and text navigation buttons!
- Ability to disable CSP, CORS, HSTS, and SOP!
- Experimental (and kinda broken) ability to disable e10s (multiprocess), Skia, and DirectWrite!
- Other options including the ability to easily disable geolocation, Web Audio, tab groups, screenshot component, tab hover preview, drop to pin tabs, add tab to taskbar button, urlbar foratting, switch to tab behavior, and more!
- Ability to disable e10s! (Experimental and kinda broken)