prefers-color-scheme - https://repo.palemoon.org/MoonchildProductions/UXP/commit/e946ca91fb032149131087ce24fbba886c53ee18
moz-dark-theme - https://repo.palemoon.org/MoonchildProductions/UXP/commit/a0461e377582be71ca2e8669fef9a102e42a43c4
Never shrink line heights as a result of minimumFontSize. - https://repo.palemoon.org/MoonchildProductions/UXP/commit/1da0e8a095d82dd6b9ad0c0a45a7ee3b9d80ded7
Limit the CSS string length for resolved variables to sane values. - https://repo.palemoon.org/MoonchildProductions/UXP/commit/f8e83e7e6dacb7fe00ccb52f62af634bc05dbdfc
Align computed DOM styles with mainstream behavior. - Based on Bug 1467722 - https://repo.palemoon.org/MoonchildProductions/UXP/commit/d6baead6c8bcd90f04d62908bfaf73b369df4e6f
avoid displaying the Alt text if an image is loading.: https://repo.palemoon.org/MoonchildProductions/UXP/commit/d3b19e64a3d707fd5f1b00e069736a2a8507208c

LARGE PATCH - Convert Intrinsic Ratio to Float - Based on Bug 1547792 - https://repo.palemoon.org/MoonchildProductions/UXP/commit/232f987cf45aad65d20e79d283f14c72771c9bc8

Limit the CSS string length for resolved variables to sane values. https://repo.palemoon.org/MoonchildProductions/UXP/commit/f8e83e7e6dacb7fe00ccb52f62af634bc05dbdfc
Use Intrinsic Aspect Ratio for Images - https://repo.palemoon.org/MoonchildProductions/UXP/commit/3ed884a6adff46cb5871508612832ab8691752ac
Alias -webkit-appearance for compatibility reasons - https://repo.palemoon.org/MoonchildProductions/UXP/commit/d3383327a749ddb5c0626146c6f83bdfa3ea9936
Unprefix ::-moz-selection - https://repo.palemoon.org/MoonchildProductions/UXP/commit/5072843ee383bd8ae42e50aac304a33f803c0e6a
ENHANCEMENT (if a follow up patch hasn't removed it yet) - Support detecting bool preferences in chrome stylesheets - https://repo.palemoon.org/MoonchildProductions/UXP/commit/4dac05e0e0cc4ffd9359541cbfa909b928ae56c7
Interpret empty or whitespace root margin string as zero length - https://repo.palemoon.org/MoonchildProductions/UXP/commit/6f685140aa98ef0a4a8ddd6da420ea14f61ea31c
Allow unitless rootMargin entries for IntersectionObserver. - https://repo.palemoon.org/MoonchildProductions/UXP/commit/42ee994d993bc170db7cad8d57e2d19b03ae9d13