Pale Moon 34.2.1

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 34.2.1 (2026-04-28):

• Fixed a regression leading to cursive languages (where multiple characters combine) not being rendered correctly (e.g. Arabic).
• Updated our cookie magic prefix handling, adding __Http- and __Host-Http- magic prefixes and aligning our implementation with RFC 6265bis.
• Updated our Brotli library to 1.2.0+ (1.2.0 with additional fixes).
• Updated NSS to 3.90.10.0 (UXP). For clarity, the version now carries the (UXP) label to distinguish this fork (which has additional mitigations) from the 3.90 branch of NSS maintained by Mozilla.
• A large audit of security issues was performed. Many security issues were addressed, including potential crash scenarios and code correctness issues.
  As a summary: 50 potential vulnerabilities were found applicable and fixed, 20 issues had DiD code changes applied, and 4 were already mitigated by us before being reported.
  Of the reported vulnerabilities, 270 were not applicable to our code (with the vast majority pertaining to e10s/multi-process browser architecture) and 6 low-impact ones were marked for further investigation at a later time.

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