Pale Moon 25.3.1

4.1 out of 5 stars 4.1 (391 votes)


Windows 7/8/Vista/XP / Freeware / 11,124 downloads

Pale Moon is the work of a single individual, using contributed Open Source code to create a full-featured, speed optimized version of the popular 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.

Pale Moon is a middle road, cutting away support for ancient systems to achieve a significant speed and efficiency increase, but not trying to squeeze the last few percent more out of it by limiting the range of systems it will run on even more. It aims to not waste computer resources and power on inefficient programs, while at the same time serving a wide range of systems that are currently in use around the world.

  • Homepage

    Pale Moon

  • Uninstaller


  • Latest Changes

    - Fixed security vulnerability CVE-2015-0818. This vulnerability would allow remote attackers to bypass the Same Origin Policy and execute arbitrary JavaScript code with chrome privileges via vectors involving SVG hash navigation

    - Fixed IPv6 DNS resolution regression in some less common cases

Reviews of Pale Moon

  1. 3 out of 5 stars

    Reviewing 25.3.1 (Mar 25, 2015)

    Used to like and run PM.
    However, time marches on and some sites do not display fully/properly, a few of my plugins don't work, and I do like syncing between devices with FF and Chrome.

    Good luck.

  2. 3 out of 5 stars

    Reviewing 25.3.1 (Mar 25, 2015)

    I have actually stopped using Palemoon, as many sites will no longer render properly, and some disallow getting into comments, with the latest versions released.

    I also wrote the developer about a specific problem which keeps some sites from loading. He quickly and courteously gave me the answer that, since these site were not set up correctly, they were at fault, and he would not be changing the coding. I replied that Waterfox works on these same sites, but he did not budge.

    The author has his rights, but his statements reminded me of when I used to defend Opera [Presto-based] for these same sorts of things, and was always given grief because I thought that by keeping to standards, the world could slowly be brought into line. Well, that worked out great...

    Not only is Opera no more, Google has decided to not follow standards, and it is getting them lots of praise.

    What I would say is that Palemoon is great if you wish to live that way, but it is getting harder to do all the time, and Palemoon has but one dev, and less market share than Opera had.

    Great, if you can deal with the intentional problems.

  3. 5 out of 5 stars

    Reviewing 25.2.1 (Jan 30, 2015)

    Simply the best

  4. 4 out of 5 stars

    Reviewing 25.2.0 (Jan 16, 2015)

    Palemoon has ceased XP support as of version 25.0.0 released 2014-10-10

  5. 5 out of 5 stars

    Reviewing 25.2.0 (Jan 15, 2015)

    Pale Moon is just fine. Most of my add on's from firefox work. Couple that i did have problems with, I just went to the add on site for that add on, cursor'd down and found the link for older versions of that add on. From there u can see older versions that do work with Pale Moon. No stability issues. I use the 64 bit version, so if your having probs with the 32 bit version, maybe give this a try. Plus has the old firefox UI. And the 5 or 6 complete themes i use from the firefox days, work with Pale Moon.

Discuss Pale Moon

  1. Jun 29, 2010 - 5:29 PM

    Latest news:
    The Firefox 3.6.6 code base has been released. Pale Moon will follow suit when there has been sufficient time for building and testing it, but development is halted for a few weeks due to relocation. Please be patient, folks!

  2. Apr 9, 2010 - 5:22 PM

    Pale Moon doesn't start (error message when starting)
    Make sure your system meets the requirements to run Pale Moon. The most common occurrence of this error is trying to run it on a PC that doesn't meet the system requirements. If you have an Athlon XP or MP machine or a Pentium II or III, this browser will not run. Because Athlon XP is very popular, there is a version of Pale Moon specifically for those PCs [here], but the main version of Pale Moon won't run on it!

    Pale Moon for Athlon XP
    Note: these builds are a courtesy, and may be updated later than the main browser build.
    By popular demand, these browsers were built specifically for the Athlon XP or Athlon MP processors, since Pale Moon does not support these processors by default. These browsers are not as highly optimized as the standard Pale Moon browser, and were about 7-9% slower on the machine they were tested on than the standard Pale Moon in a synthetic test. Compared to Firefox, this is still a huge speed increase.