Pale Moon (64bit)25.6.0

Pale Moon is an Open Source, Firefox-based web browser for Microsoft Windows, focusing on efficiency and ease of use. Make sure to get the most out of your browser!

Pale Moon offers you a browsing experience in a browser completely built from source with carefully selected features and optimizations to maximize the browser's speed*, stability and user experience, while maintaining compatibility with the thousands of Firefox extensions you have come to love and rely on.

This browser, even though close to Firefox in the way it works, offers a different set of features than its sibling. A few carefully selected features have been disabled that are not in high demand, and that do not interfere with the way web pages are displayed or function; all to maximize the efficiency of the browser. Please see the page with technical details to learn exactly what the browser supports, and what it doesn't support. For example, if you need accessibility features or parental controls, then please visit the Firefox homepage and get the official, non-optimized version of the browser.

Pale Moon will continue to provide appropriately sized grouped navigation buttons, bookmark toolbars enabled by default, tabs next to the default page content (easy to switch) and at least no functional status bar and more freedom of customization, to name a few things.

Pale Moon is and will always be open source and completely free to download and use!

Key Features:
  • Optimized for modern processors
  • Based on the Unified XUL Platform (UXP) containing our own optimized layout and rendering engine (Goanna)
  • Safe: forked from mature Mozilla code and regularly updated with the latest security patches
  • Secure: Additional security features and security-aware development
  • Supported by our user community, and fully non-profit
  • Privacy-aware: zero ads; no telemetry, spyware or data gathering
  • Familiar, efficient, fully customizable interface
  • Support for full themes: total freedom for any element's design
  • Support for easily-created lightweight themes (skins)
  • Smooth and speedy page drawing and script processing
  • Superior gradients and fonts
  • Will continue to support NPAPI plugins like Silverlight, Flash and Java
  • Support for a growing number of Pale Moon exclusive extensions
  • Extensive and growing support for existing web standards

What's New

Version 25.6.0

Fixes/changes:

  • Canvas anti-fingerprinting option: Pale Moon now includes the option to make canvas fingerprinting much more difficult. By setting the about:config preference canvas.poisondata to true, any data read back from canvas surfaces will be "poisoned" with humanly-imperceptible data changes. By default this is off, because it has a large performance impact on the routines reading this data.
  • Added a feature to allow icon fonts to be used even when users disallow the use of document-specified fonts. This should retain full navigation for icon-font heavy websites (no more dreaded "boxes" with hex codes) when custom text fonts are disabled.
  • Added a feature to prevent screen savers from kicking in when playing full-screen HTML5 video. This is currently not yet operational on Linux because of stability issues we've run into on that OS, but Windows should properly benefit from this change.
  • The "autocomplete=off" parameter for signon forms is now completely ignored by default, to keep the user in control of their browser's behavior and allowing credentials to be saved if wished. If you prefer the previous behavior, allowing a website to determine whether autocomplete should be allowed or not, then change the about:config preference signon.ignoreAutocomplete to false.
  • Reinstated the packaging of pre-compiled scripts in the browser. Hopefully this will fix the reports by some users who found that initial start-up after installation/upgrade of the browser was unacceptably slow. Unfortunately this means a slightly larger download/install size as a trade-off.
  • Added the option to use Chrome://../skin/ overrides, in effect allowing the use of "Icon themes"; toolbar icon replacements to customize your browser icons without the need for any CSS or full-blown theming.
  • Added a count for the number of matches in the find bar. it will now list the total number of matches found, and which match is the currently highlighted one.
  • Fixed the issue where highlighted words after finding and highlighting them all in a page would remain highlighted when closing the find bar.
  • Added support for CSP 'nonce' keywords (CSP 1.1/2.0). Please note that this is still experimental and may not work 100% as-expected. Please report any bugs you may find.
  • Aligned CSP more with the spec in terms of reporting and case-sensitivity of matches, and made it more app-friendly.
  • Added -moz-os-version selectors for @media CSS queries to simplify theming on different operating systems (esp. Windows).
  • Updated and improved several languages for the Status Bar code, and added Slovenian.
  • Fixed an issue in the internal updater window not showing proper language strings.
  • Fixed an issue where the unexpected use of "backface-visibility" on non-3D transformed elements (like the body) would break positioned elements on web pages.
  • Fixed text positioning in the combobox display area when a non-default height is set for the combobox.
  • Fixed a crash caused by bad Opus audio encoding in media files.
  • Fixed a crash when trying to measure memory in about:memory while playing video.
  • Fixed a rare crash in sLayersAccelerationPrefsInitialized
  • Fixed miscellaneous other crashes.
  • Fixed a DNS prefetching issue for the people using this feature.
  • Fixed an issue with single-word searches from the address bar when a proxy is in use.
  • Fixed a number of build issues on Linux when using system libs.
  • Added support for link-time optimization on newer Linux compilers.
  • Removed more telemetry code (ongoing project!).

Security fixes:

  • Fixed a memory safety bug due to a bad test in nsZipArchive.cpp (CVE-2015-2735).
  • Fixed a memory safety bug in nsZipArchive::BuildFileList (CVE-2015-2736).
  • Fixed a memory safety bug caused by an overflow in nsXMLHttpRequest::AppendToResponseText (CVE-2015-2740).
  • Fixed a Use After Free in CanonicalizeXPCOMParticipant (CVE-2015-2722).
  • Fixed off-main-thread nsIPrincipal use of various consumers in the tree (only grab the principal when needed).
  • Fixed an issue where an IPDL message was sent off the main thread.
  • Fixed a potentially exploitable TCPSocket crash due to a race condition.

User Reviews

Security Levels

To avoid any potential harm to your device and ensure the security of your data and privacy, our team checks every time a new installation file is uploaded to our servers or linked to a remote server and periodically reviews the file to confirm or update its status. Based on this checking, we set the following security levels for any downloadable files.

Clean

It is highly likely that this software program is clean.

We scanned files and URLs associated with this software program in more than 60 of the world's leading antivirus services; no possible threats were found. And there is no third-party softwarebundled.

Warning

This program is advertising supported and may offer to install third-party programs that are not required. These may include a toolbar, changing your homepage, default search engine, or installing other party programs. These could be false positives, and our users are advised to be careful when installing and using this software.

Disabled

This software is no longer available for download. It is highly likely that this software program is malicious or has security issues or other reasons.

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