Pale Moon 15.1

Pale Moon is a custom-built and optimized Firefox-based browser for Windows operating systems with current, high performance processors. It looks identical to the standard Firefox browser and supports Firefox extensions, themes and identities.


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

What's new in this version:

This is a major update to the new v15.0 release, to address a fairly large number of issues with the initial version.

Important note:

  • From this release onwards, the system requirements for your operating system have changed: If you are still running Windows XP, you are required to have Service Pack 3 installed on it, or the browser will not start.


  • Restore Windows XP Professional x64 compatibility in the installer.
  • Fix the mouse wheel smooth scrolling preferences in the preferences dialog box (did not work in v15.0)
  • Prevent memory inflation on some integrated graphics drivers in canvas games
  • Fix for private browsing mode (Firefox 15.0.1 top fix)
  • Fix for Javascript stability issues on 32-bit versions

Regression fixes:

  • Restore the favicon in the URL bar. (Behavior change: new logic)
  • Fix for top level images with transparency (white background)
  • Remove noise from top level image background
  • Undo the redesign of the Safe Mode dialog box
  • Restore Alt-Click save dialog box
  • Restore proper identity panel for domain-verified sites (blue panel)
  • Restore support for the browser.identity.ssl_domain_display setting
  • Restore address bar autofill preference to its desired default state (no autofill)

Added features:

  • Add control for a custom top level image background color
  • Implement Direct2D brush caching (performance win)
  • Implement multi-threaded box blur (performance win for multi-core systems)
  • Add a Profile Reset feature (from Help -> Troubleshooting information)
  • Build with a faster floating point method

To keep these release notes concise, this is just a plain list of changes. You are encouraged to read the extended changelog post on the Pale Moon forum if you have any questions or want clarification about any of the items mentioned.

Download: Pale Moon 15.1 | 13.9 MB (Freeware)
Download: Portable Pale Moon 15.1 | 15.8 MB
Download: Pale Moon 15.1 x64 | 15.2 MB
View: Homepage

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