I donate to the Mozilla foundation, and I love Firefox a ton. But I can't seem to like the UI by installing a theme, and when I change it to look better the browser slows to a crawl. Does it really matter all that much if I use Chromium?
P.S. To the people from my last post regarding something similar, Firefox was too slow, I'm sorry, but I use Vivaldi instead of Brave because Brendon Eich can suck my dick.
While it is important in a sense what you use, you and I are such a miniscule inconsequential part of the equation that it won't matter what you actually end up using
Use what you like instead and dont worry too much about what these hokier than thou doichenozzles wanna force you into usinfg