Pale Moon 33.6.0.1

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 33.6.0.1 (2025-02-20):

• Disabled CSP reporting temporarily to work around memory issues caused by CloudFlare’s scripting. While CSP reporting is important to inform webmasters of issues with their content security policies, not having the browser eat up all memory is more critical. We do intend to re-enable this when the issue is resolved on CloudFlare’s side.
• Improved CSS grid performance to avoid exponential calculations and reflows caused by CloudFlare’s scripting. This wasn’t a bug, per se, but could easily lock up with bad scripting if called recursively.
• Added a few other small fixes that are tangentially related to the code changes made.

Changes in Pale Moon 33.6.0 (2025-02-07):

• Implemented a content sniffer for ADTS and raw AAC audio.
• Implemented AbortSignal.abort() and stub AbortSignal.timeout().
• Unprefixed the :modal CSS pseudo-class and exposed it to content.
• Improved efficiency and performance of the Cycle Collector.
• Added a check for explicit expectance of a percentage value in CSS HSL for the S and L components.
• Updated the cookie storage database to no longer use BaseDomain. See implementation notes.
• Updated CSS grid handling to no longer apply auto min-sizing when flex max-sizing (browser parity).
• Updated the root certificates in the internal trust store.
• Updated the Public Suffix List (eTLD) in the browser.
• Removed no longer specced URL Constructor(DOMString
url, URL base).
• Restored unofficial branding to what it was before (“New Moon” instead of “Browser”).
• Changed the default Firefox Compatibility user-agent version to 115.0.
• Fixed an issue where cloned <audio> or <video> elements would not respect the original element’s muted state.
• Fixed a number of bugs and spec compliance issues in WebCrypto.
• Fixed installer application naming issue causing failure to detect running application.
• Fixed a crash when Interval handlers are present in scripts that are automatically terminated due to excessive runtime.
• Fixed a crash in JS Structured Cloning when the input would be bogus (CloudFlare-triggered crash).
• Fixed a crash in the XSLT stylesheet importing code.
• Updated NSS to 3.90.6 (custom) to pick up several security fixes.
• Security issues addressed: CVE-2025-1009.

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: 29.6 MB

DOWNLOAD Pale Moon for Windows x86

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DOWNLOAD Pale Moon Portable for Windows x86

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DOWNLOAD Pale Moon for Linux x64 – GTK3 tarball

DOWNLOAD Pale Moon for Linux x64 – GTK2 tarball