This optimization is now disabled by default but if you need that little extra performance (usually only noticed in very optimized code or some benchmarks) then you can re-enable it, trading in stability, by setting the new preference to true. Module scripting caused some persistent and very hard to track browser crashes that we've narrowed down to a specific optimization in the JavaScript JIT (Just-In-Time) compiler (IonMonkey).As such, the browser will now warn you if the user-agent is globally overridden (in preferences) and allow you to easily reset that override and re-enable the various compatibility modes. It would also override the compatibility modes (Native/Gecko/Firefox) in Pale Moon. Please note that using a blanket override is normally (very) counterproductive and does not, in fact, help much with privacy. The global user-agent override was moved to the networking component where it is actually implemented.Unified XUL Platform Mozilla Security Patch Summary: 2 fixed, 1 deferred to the next release, 16 not applicable.Mac-beta: Improved version detection of MacOS including Big Sur.Windows: Changed the way downloaded files without an extension are handled.Updated the list of prohibited ports the browser can use.Fixed a regression when waking the computer from standby causing high CPU usage in some uncommon situations.Fixed some code logic issues with websockets.Fixed a website layout issue with table-styled elements potentially overlapping when placed inside a flexbox.Worked around crashes and run-time issues with module scripts.Moved the global user-agent override to the networking component.Re-enabled the DOM Filesystem API for web compatibility.Changed the way dates and times are formatted in the UI to properly adhere to the user's regional settings in the O.S.Many customization and configuration options.Extensive and growing support for HTML5 and CSS3.Support for a growing number of Pale Moon exclusive extensions.Increased stability: experience fewer browser crashes.Smooth and speedy page drawing and script processing.Support for easily-created lightweight themes (skins).

Support for full themes: total freedom over any elements design.Familiar, efficient, fully customizable interface.Supported by our user community, and fully non-profit.Secure: Additional security features and security-aware development.

Safe: forked from mature Mozilla code and regularly updated.

Based on proprietary optimized layout engine (Goanna).

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