Alright, I've migrated out of the Chromium ecosystem back into the Firefox ecosystem. I'm using a branch called Pulse that strips out a bunch of the extraneous gunk that got me to migrate away from Firefox in about 2015 or so. It resembles Chromium a bit. Very clean and slim.
After dropping Firefox the last time I actually started using Edge, back when it was a proprietary browser and not itself a Chromium fork. I actually liked it a lot and for a while it was the only browser I even had installed on my system. Once it became a Chromium fork, Microsoft started adding shit to it and just would not fucking stop, and when I finally got fed up with it, that's what led me to discover the Chromium fork that I used the longest, which was SRWare Iron, based around stripping as much unnecessary cruft from Chromium as possible while keeping it functional. I actually ran into a few webpages that outright didn't work because they relied on tracking stuff that Chromium--not Chrome, Chromium--didn't have. Pulse seems to be the Firefox fork that follows that idea the closest. It seems pretty good so far.