@mweston
I'm still using Firefox on Linux as my main browser. I haven't switched - yet. Using any of the various rebuilds of Firefox isn't great even as a bandaid solution - lots has been written about this, if you're interested. Using anything derived from Chromium is dubious because of who effectively owns / controls it, although I keep a build of Chromium and another of Vivaldi around for those sites that only work with "Chrome".
I want a browser that cannot (not just "has not yet") be enshittified against the interests of its users because it is controlled by a for-profit corporation. That leaves Firefox, which Mozilla has been doing dumb e14n-like things to for years, and the former Mozilla project Servo, which isn't a full browser - at least not yet.
Note I'm discounting things like Dillo that don't work with many sites.