Luckily, there’s a solution… https://librewolf.net/
It does indeed look superior. But getting the 2nd most important software on my PC from a group of randos with not even full names and God knows what level of opsec is just too scary even for me. I've been toying with the idea of setting up a build enviroment for LibreWolf myself but that would still require auditing the patches and their changes as they come in every day.
further reading, for anyone looking for an alt browser/config: arkenfox (af) v librewolf (lw) v mullvad browser (mb) from the af owner, mb maintainer, and lw, ff, & tor contributor: https://github.com/mullvad/mullvad-browser/issues/1#issuecom...