Pale Moon est, ce qu'on pourrait appeler, un clone de Firefox créé par des développeurs qui étaient en désaccord avec la feuille de route du navigateur de la fondation Mozilla à l'époque de la mise en place du thème Australis (celui qui ressemble à s'y méprendre à Google Chrome). Afin d'être plus indépendants possible, les développeurs ont également décidé de cloner le moteur de rendu Gecko (et de l'appeler Goanna) afin d'y apporter eux-mêmes les correctifs de sécurité et autres nouveautés tout en gardant l'esprit de "l'ancien" Firefox.
De ce fait, Pale Moon est désormais un navigateur totalement indépendant de Mozilla et suit donc son propre rythme de mise à jour. Pale Moon est disponible sur Windows (à partir de Windows 7) et sur Linux.

Pale Moon
Version actuelle : 33.9.0.1 - Liste d'extensions compatible
Windows : 32 bits, 64 bits - Portable 32 bits, 64 bits | macOS Intel, ARM | Linux
v33.9.0.1 (2025-09-24)
This is a small, critical update to address issues with the browser's stability and usability due to the 33.9.0 changes to X-Content-Type-Options: nosniff
header parsing.
Mac and FreeBSD will follow shortly when the maintainer has been able to build the update.
v33.9.0 (2025-09-23)
This is a major development, bugfix and security release, focusing primarily on improving web compatibility.
Special thanks to the students from the University of the Philippines Los Baños for their work on improving CSS in the platform over the summer!
New features:
- Implemented the CSS4
revert
keyword. - Implemented the
clip
keyword foroverflow
. See implementation notes. - Implemented axis-shorthand parsing of
overflow
. This should fix some issues with areas being unscrollable on the web. - Implemented CSS
color-mix
(RGB and HSL color spaces only). - Implemented CSS
@supports(selector(<complex selector>))
syntax. - Implemented CSS Cascade Layers
@layer
support. - Implemented support for CSS
clip-path:<geometry-box>
without actually supplying a clip path to use. See implementation notes. - Implemented
overflow-inline
andoverflow-block
CSS properties. - Implemented the
:autofill
CSS pseudo-class. Auto-filled fields will now also be styled by default to indicate autofilling/password manager recall has occurred. - Implemented the
:focus-visible
CSS pseudo-class. - Implemented the
prefers-reduced-motion
CSS media query. See implementation notes. - Implemented a minimal version of the
visualViewport
web API. See implementation notes.
Changes/fixes:
- Un-prefixed CSS
-moz-user-select
and aligned with theuser-select
CSS4 spec. - Un-prefixed CSS
-moz-read-only
and-moz-read-write
pseudo-classes. - Improved the handling of
X-Content-Type-Options: nosniff
to align more with the spec and expected behavior on the web. - Added support for FFmpeg 7.0/libavcodec 61.
- Fixed a bug where sub-properties of CSS
border-image
would not update when the value they inherit from changes. - Fixed a bug where
scrollbar-width
was incorrectly treated as an inherited property. - Fixed an issue where screen/pixel color depth could potentially be mis-reported on Linux.
- Fixed a potential issue with fontconfig on Linux. We now explicitly initialize fontconfig on startup.
- Fixed various issues with vpx on PowerPC architectures.
- Fixed issues when building ffvpx on architectures without assembly support.
- Fixed a memory safety issue in two-position gradient color-stops code.
- Changed the way
@import
rules are processed. They will now be processed in the order of appearance in the importing stylesheet. - Changed how
TypedArray
constructors handle initialization values, aligning with the ECMAScript spec. See implementation notes. - Changed how
Cache-control
HTTP headers are parsed if multiple headers are present in a response. - Made additional improvements to "Copy as cURL" devtools command.
- Security issues addressed: CVE-2025-10536 and CVE-2025-10533 DiD.