Nocturne is a fork of firefox that restores various removed customization options from older releases of Firefox, keeps Windows 7 and 8 support alive thanks to Firefox-for-Windows-7 patches, and targets customized Windows 10/11 builds.
All the themes in the screenshots were taken from the ESR 140 (3.x.x) version of Nocturne and might not work on 4.0+ (153 ESR). I will retake new screenshots when I have time. Sorry...
Nocturne on Windows 7 (With Geckium installed)
Nocturne on Windows 10 skinned as Windows 8 (With Echelon 140 installed)
Nocturne on Windows 10 skinned as Windows XP (With Namoroka installed)
Nocturne keeps the browser feeling familiar while adding Windows-focused polish and compatibility:
- More native-like controls, scrollbars, checkboxes, radio buttons, and tooltips
- Aero Glass support on Windows 8/10+
- Full portable mode that doesn't touch AppData
- Switchable classic about:config page via
browser.ui.oldaboutconfig - Less telemetry than regular Firefox
- No background tasks
- Firefox 68-style retry button for failed downloads via
nocturne.ui.ff68downloadicons - JPEG XL support
- GPU/hardware acceleration in VMware Workstation 16 and above
general.useragent.override.(website)is back- XUL Extensions are back!
- XUL theme support!
- 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
nocturne.legacyiconbehavior.enabled - Ability to bring back the 16x16 icon via
nocturne.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.
- Travis, NetworkNeighborhood - The current logo used in the browser. Recolored from the original.
- Nareny - Modified the icon for Incognito, made the .pdf icon and helped with the new icon redesign.
- e3kskoy7wqk - Firefox for Windows 7 patches to make Nocturne work on Windows 8.1 and lower.
- Aubymori & Isabella Lulamoon - Classic about:config, disabled launcher process, and more from Nara browser
- Erizur - Improved native titlebar, modern mode, brightwork, and more miscellaneous fixes from Marble Browser
- OmegaAOL - Miscellaneous improvements and features.
- K4sum1 - J’ai repris certains patchs que je ne savais pas comment améliorer, ou qui ne contenaient tout simplement rien que je puisse améliorer, puisque je m’étais à l’origine basé sur leur branche forkée.
- Feodor2 - Portable mode and Vista compatibility changes from Mypal68
- MrAlex94/Waterfox - Some patches and some commits for XUL extensions.
- 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
- Mozilla Developers - Firefox browser base
- Tor Browser Developers - Addon fix code from Tor Browser
- wanderer - Various code contributions for Vista support / extra help in Nocturne
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.