I'm in the same boat! I have tried, really tried, the only things I like are the extensions support on mobile browser, and the sync with the Wolvic on the Quest VR, but it feels old and some websites render weirdly on it, plus the lack of support for PWAs really make it tough.
I like Brave best, with Edge as a second choice, as weird as that sounds. I miss Firefox when it was the modern and most secure browser.
I want to use Firefox. Firefox used to have really cool tab groups, then they removed it, and the extensions that do it can sometimes lose your work. It’s a shame since pretty much every other browser has tab groups now.
Vertical tabs are another thing that other browsers are adding and doing right, and Firefox is not. I don’t like the way they make stuff like tree style tabs use a sidebar and want something more native (which again, they used to have, or at least extensions could do, but now everything is worse and limited).
I end up using Brave too, and I like Edge except Microsoft keeps doing shady things with it like uploading images to their servers and removing the ability to delete your sync data - so it ends up being a neat browser that I won’t touch.