Skyfox is a fork of Nocturne (which is a fork of r3dfox) that restores removed Firefox features, partial legacy XUL/XPCOM extension support, UI elements, dialogs, and windows, along with CSS customization options. It keeps Windows 7 and 8 support alive, but primarily targets customized Windows 10/11 builds.
If you are looking for the Nocturne-branded Skyfox branch (useful for diffs) you can find it here.
Skyfox keeps the browser feeling familiar while adding Windows-focused polish and compatibility:
- More native-like controls, scrollbars, checkboxes, radio buttons, and tooltips
- Ability to install and use some legacy XPCOM/XUL extensions and make new ones completely compatible with Skyfox
- Aero Glass support on Windows 8/10+
- Full portable mode that doesn't touch AppData
- Restored the classic XUL Preferences window, toggleable by setting
browser.preferences.incontenttofalse. - Enabled the classic Credential Manager UI and restored the classic Password Manager UI, both accessible from the XUL Preferences window.
- Optional classic about:config page, toggleable via
skyfox.ui.oldaboutconfig - Less telemetry than regular Firefox
- No background tasks
- Firefox 68-style retry button for failed downloads via
skyfox.ui.ff68downloadicons - 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 revert icons to the legacy behavior via
skyfox.legacyiconbehavior.enabled - Ability to bring back the 16x16 icon via
skyfox.smalliconbehavior.enabled - Reimplemented
-moz-win-glassfor a glass look with borders - Reimplemented the old URL search bar for pre-133 themes
and more!
If I've forgotten to put your name here, please let me know and I'll add it.
- Mozilla Developers - Mozilla Firefox (base)
- ImSwordQueen and raytek.cafe - Nocturne (base)
- the_r3dacted, wuggy, Eclipse Community - Eclipse r3dfox (base)
- Aubymori & Isabella Lulamoon - Classic about:config, disabled launcher process, and more from Nara browser
- Erizur - Improved native titlebar, modern mode, and some miscellaneous fixes from Marble Browser
- Isabella Lulamoon - Native Controls Patch
- Feodor2 - Portable mode and Vista compatibility changes from Mypal68
- OmegaAOL - Classic XUL Preferences window
- goodusername123 - Graphical acceleration in VMware Workstation
- i486 - Fixed non-native menus
- leadweedy - Improved active tab indicator from Firefox-Proton-Square
- bbc-chi - Fullscreen transition fix
- Alex313031 - Mozconfig, general help with the browser, and changes from Mercury browser
- newbie-461 - Fixed the installer issues
- SashaXser - Improved rustflags opts in mozconfig
- Librewolf Developers - Privacy tweaks from Librewolf
- Tor Browser Developers - Addon fix code from Tor Browser
- wanderer - Various code contributions for Vista support / extra help in Nocturne