Alternatives to Firefox that are not Microsoft-owned or Chormium-based?

I like Firefox in general, it has all the features that I need (everyone has different needs\ tastes), but over the last decade or so I've been getting more and more frustrated with it. The first straw for me was when Mozilla added Electrolysis, making the browser run several processes, something that I hated Chrome for (to be fair, though, it's still more stable and less resource-hogging than Chrome, so at least that's good). Then they started adding crap like Pocket, obnoxious in-browser advertising (including blatant lies about caring about you and your privacy), and recently they added in the unremovable 'List all tabs' feature that just takes up space in the tabs section (technically it was first added in 2020, then removed, and now it's back).

I can ignore all of that if I'm given a choice to remove\ switch-off the things that I don't need\ don't like, but it feels like the farther we go, the less control the end-user gets over the browser. Now, whenever you want to remove something, you have to go into the about:config menu, or worse, mess around with css. I mean, it's not a big problem per say, but it's annoying that end-users have to jump through all these hoops just to set something up for themselves. And Mozilla does this deliberately, knowing that most users don't know how to do this stuff, or don't care enough to, so they end up with a bloated browser. How's that caring about the user? It's not.

As such, to the question: What alternatives are there? I got disappointed in Chrome, so no Chromium-based browsers, please. And don't even get me started on Microsoft.

Thank you.