Pale Moon 35.0.2

Pale Moon is a custom-built and speed optimized Firefox browser. The project uses contributed Open Source code to create a full-featured, speed optimized browser based on Firefox browser.

Having seen the advantages on other systems (e.g. Linux) with regards to programs being compiled specifically for the capabilities of the machine it is installed on, it became obviously clear that Windows users were at a disadvantage.

Mozilla only releases windows executables with maximum compatibility in mind, meaning that Firefox is made to run on as many different systems as possible, sacrificing efficiency and speed in the process to be compatible with, by current standards, absolutely ancient hardware.

Mozilla does not provide optimized browser packages for Windows. That means you may be lose speed and efficiency when you use your browser.

That needs to change. Therefore Pale Moon project offers custom-built and optimized Firefox browsers for Windows Operating Systems. Make sure to get the most speed and efficiency out of your browser!

Pale Moon Main features:

• Highly optimized for modern processors
• 100% Firefox sourced: As safe as the browser that has seen years of development.
• Support for Firefox extensions (add-ons), themes and personas
• Able to use existing Firefox profiles, bookmarks and settings with this migration tool
• Uses slightly less memory because of disabled redundant and optional code
• Significant speed increases for page drawing and script processing
• Support for HTML5 and WebGL (v4)
• Stability: experience fewer browser crashes.
• Support for SVG and Canvas, and downloadable fonts including WOFF
• Support for OOPP (Out-of-process plugin execution)

Users will find a slightly more conservative approach to changes in the user interface in the Pale Moon browser. It, although very close to Firefox, is (now more obviously so than before) a different product. However, these differences in layout do not prevent anyone from configuring their browser interface to exactly the way they want it to look and work. Including like Mozilla Firefox’s default layout if they so wish.

Changes in Pale Moon 35.0.2 (2026-10-06):

• Disabled the new :has() CSS implementation by default for performance reasons. See implementation notes.
• Added a preference for handling of improper form element placement in HTML. See implementation notes.
• Fixed several application crashes.
• Backported an upstream libvpx VP8 decoder fix.
• Fixed an issue in the BigInt implementation for specific JavaScript calls failing.
• Fixed a potentially exploitable memory leak.
• Security issues addressed: CVE-2026-100822, CVE-2026-100783, CVE-2026-100773 (DiD), CVE-2026-96869 (DiD) and CVE-2026-100791.

Implementation notes:

• The implementation for the CSS :has() pseudo element selector was disabled by default for causing additional severe performance issues on websites. This reduces web compatibility for some sites, but the feature turned out to have too much of a performance-impacting issue to leave it enabled by default. This should improve performance of the browser across the board while we investigate the root cause of this performance impact in our development going forward. Expect this feature to be enabled again later on after we have addressed the performance issues.
  If you don’t mind the performance impact or have fast hardware, you can enable the feature with the preference layout.css.has-pseudo.enabled (set it to true) for broader website compatibility at the cost of processing.
• In v35, we tightened our handling of form elements in HTML documents for security reasons, to adhere more strictly to the HTML standard regarding forms in tables. A detailed explanation can be found in this forum topic, including how to fix it in the documents or potential workarounds. You can control this with the preference html5.forms.standards_compliant. By default this is set to true to adhere to the spec, but you can (temporarily) disable this with false (with a page reload) to allow more lax parsing of forms similar to pre-v35 versions of Pale Moon.

Changes in Pale Moon 35.0.1 (2026-09-22):

• Fixed a major performance bug with the new :has() implementation.
• Fixed potential undefined behavior in float to int32 conversions.
• Made checking for structural errors in XML-based files more strict.
• Fixed a crash in the WeakRef implementation.
• Fixed a potential issue in UI tooltips (DiD).
• Fixed a regression in XSLT transformations that would result in incorrect output.
• Security issues addressed: CVE-2026-92016 (DiD), CVE-2026-92044, CVE-2026-92049, CVE-2026-92030 and CVE-2026-92012.

Homepage – https://www.palemoon.org

Minimum System Requirements:

• Windows 7, 8, 8.1, 10,11
• Windows Server 2008 R2 or later
• A processor with SSE2 instruction support
• 1 GB of RAM
• At least 200 MB of free (uncompressed) disk space

Size: 29.8 MB

DOWNLOAD Pale Moon for Windows x86

DOWNLOAD Pale Moon for Windows x64

DOWNLOAD Pale Moon Portable for Windows x86

DOWNLOAD Pale Moon Portable for Windows x64

DOWNLOAD Pale Moon for Linux x64 – GTK3 tarball

DOWNLOAD Pale Moon for Linux x64 – GTK2 tarball