Pale Moon 15.3 released, download now

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

New and changed in this version:

Pale Moon 15.3 is an important update that sees a number of under-the-hood changes. The are no functional changes in this update.


  • The compiler has been changed to a newer version (Visual Studio 2012). This has a few consequences:
  • Better handling of the browser overall: things like smooth scrolling, the user interface and page loading should be noticeably smoother on the vast majority of computers.
  • Automatic vectorization: If your hardware supports it, more advanced processor instructions are used.
  • Support for multiple cores.
  • The 64-bit version of Pale Moon will no longer support Windows XP.
  • Incremental garbage collection for Javascript.


  • Minimize intermediate surface size in Azure to mitigate performance regression.
  • Fix SVG clip paths in Azure.
  • Fix drawing artifacts in Azure.
  • Fix fuzzy equal function.
  • Some fixes for the Windows Aero user interface that popped up with the new compiler.

Download: Pale Moon 15.3 | 13.9 MB (Freeware)
Download: Portable Pale Moon 15.3 | 15.8 MB
Download: Pale Moon 15.3 x64 | 15.2 MB
View: Homepage | Release Notes

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The author has a vision and sticks to it pretty well, but whether or not his desires align with yours is up to you. Palemoon tends to be conservative with UI changes. Given that the firefox team seems a little unfocused there IMO, this is not a bad thing.
So, more stable front-facing UI and better compiler optimizations for newer CPUs. If you care about that, it's a good choice. If you don't, stick with Firefox.

Skyfrog said,
A bit slow aren't they? Firefox 16 has been out forever.

It doesn't matter. Palemoon 15.3 already comes with many Firefox 16 features, and that's why they deem the version upgrade unneeded.