Pale Moon 33.8.0.0

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 33.8.0 (2025-07-01):

• Pale Moon now includes all non-ubiquitous image and media types in the navigation Accept: header, as discussed in the relevant whatwg fetch spec issue.
• Implemented .toJSON() for DOMRect, DOMPoint and DOMMatrix.
• Added a base implementation of the SVGGeometryElement API. This is currently limited to .pathLength, getTotalLength() and getPointAtLength(distance)for SVG paths.
• Added a base-64/character validity grammar check for CSP nonces.
• Enabled JPEG-XL support unconditionally.
• Improved desktop ARM media capabilities.
• Improved our handling of CSP checks (multiple improvements surrounding loading principal checks).
• Added several Mac-specific file types to be treated as executables.
• Updated the emoji font to Unicode 16.0.0. We can now finally have the “tired dev” emoji 🫩!
• Updated SQLite library to 3.50.1.
• Updated NSS to 3.90.7.1 to fix some issues with some sites due to prior root certificate updates.
• Updated code dealing with internal URL rewrites for Youtube.
• Changed the Firefox compatibility mode version to 128.
• Changed how .click() on <A> elements is handled. See implementation notes.
• Changed DOMMatrix’s rotate() and rotateSelf() functions to accept 3D rotation instead of 2D, per spec.
• Changed CSS parameter animation to round values instead of truncating them, per spec.
  This affects all integer properties (e.g. z-order) and font-stretching.
• Changed HTML element attribute parsing to additionally escape < and > characters, per spec.
• Fixed a regression in XUL <tree> elements where column selection would omit the first-defined column.
• Fixed a minor issue in DOMSVGPoint finity checks.
• Fixed some minor platform issues and updated Mac SDK checks.
• Fixed an issue when device contrast values would be unset in Mac or Windows+DirectWrite.
• Fixed an issue in 33.7.2’s updated “Copy as curl” feature which could potentially mangle URLs.
• Fixed an issue with FontFaceSet loading.
• Removed support for very old libavcodec versions (before v58).
• Removed the CSP referrer directive as it’s no longer in the spec.
• Removed preloading of a number of media libraries on Windows. See implementation notes.
• Removed the allowance of <A> in image maps. Only <area> is now supported.
• Removed several obsolete and unused preferences from about:config.
• Removed obsolete NPN preferences and calls. NPN has long since been replaced by ALPN.
• Removed obsolete SVGZoomEvent interface and handlers.
• Security issues addressed: CVE-2025-6429, CVE-2025-6424 (DiD) and CVE-2025-6426.

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

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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