Portable Pale Moon full changelog

This is a minor release to address some critical issues in the new milestone.
Changes/fixes:
Backed out the expat library update for causing memory inflation and browser hang issues on XUL/XML and SVG files with particularly large attributes.
Backed out the change of the Javascript PRNG for causing intermittent issues and crashes on 32-bit platforms.
Both of these issues are being investigated and can hopefully re-land with the next development release.

This is a new milestone release! There are many changes in this milestone; the most important ones are highlighted here.
New features:
Our default theme on Windows received a refresh and update. It should integrate better with Windows 11 now, and be more responsive to dark accent colors, among other things.
Implemented WeakRef. See implementation notes.
Implemented URL.canParse().
Implemented the inset-block and inset-inline CSS shorthands.
Added a preference (privacy.forgetaboutsite.clearPasswords) to control clearing of passwords when using "forget about this site" in the permissions manager, and disabled clearing of passwords by default, since it was considered unexpected behavior by the community.
Changed our JavaScript PRNG to Xoroshiro128++ to make it more robust while keeping high performance.
Important updates and fixes:
Re-landed CSS Cascade Layers support after the previous back-out.
Re-landed CSS color-mix support after the previous back-out. RGB and HSL color spaces only, like previous.
Implemented viewport overflow propagation logic. See implementation notes.
Unprefixed CSS -moz-appearance; Pale Moon now accepts the unprefixed CSS appearance keyword. For compatibility, -moz-appearance and -webkit-appearance (if enabled) have been retained, although the long-term plan is to eventually remove the -moz prefixed one, so if you are an extension or theme developer, please consider switching your CSS to use appearance without a prefix.
Fixed an intermittent but fairly prominent crash-to-desktop due to JavaScript garbage collection on certain modern sites.
Fixed a crash on sites with certain types of CSP handling.
Fixed a crash in WASM.
Updated NSS to 3.90.9 (custom) to pick up several security and stability fixes.
Updated ICU to v78.1. This is a major uplift for our internationalization subsystem, allowing further future developments for the Internationalization API.
Updated Emoji support to Unicode 17.
Updated our expat parser code to a more recent