There have been some recent updates where my manual settings in about:config seem to be ignored (I have all the dark theme/gtk theming options set to false or o

There have been some recent updates where my manual settings in about:config seem to be ignored (I have all the dark theme/gtk theming options set to false or otherwise disabled) and it still uses this trash dark theme on some sites, like DDG and GitHub. As well file and custom URIs are completely broken when installed as a snap. I cannot view any file on my system by manually typing in file://path/to/file whereas the uri functions fine in chrome. Custom application URIs require manually setting Firefox to open them in the given application, which is actually non trivial since it can't seem to find any application in the default browser, and it doesn't respect any system configuration. Meanwhile chrome just works. These are issues I have only with Firefox on some installations, I can't seem to recreate them all the time.