I've been a Firefox user since before Chrome was launched - it was one of the very few alternatives to IE at the time. And during these years, it was a breath of fresh air. When Chrome launched, as others have noted, Google leveraged its coffers to provide the new browser with extensive advertising and PR and of course, the icing on the cake, it actually was a great browser too.
I never ran benchmarks or anything but there were certainly a number of years in which Chrome did seem like a faster browser. That said, I was always skeptical because the browser was a Google product. But I stuck with Firefox except for rare cases, mostly in the past 5 or so years, where certain sites didn't even appear to function properly without it (it being Chrome).
Because of sites like these, I am at least appreciative that there are other Chromium-based browsers (which now, apparently include Microsoft Edge) that offer more or less the same site functionality as Chrome without having to directly leverage a Google product.
I for one quite like Brave and its privacy features, including its defaults. Blocking ads by default is great, though of course, Brave compensates for this by presenting its own ads (which are still annoying, but less so to me). I like the ability to use Tor and DuckDuckGo easily just by starting a private window. It also seems to me that Brave is just as fast, if not faster than Firefox. In addition to this, you can use almost every Chrome extension on the Brave browser (for me, the important stuff is uBlock Origin, Dark Reader, and a Password Manager). I know many here are skeptical or disapproving of the 'Brave Rewards' cryptocurrency - and I get that. But I have completely ignored it (it is an opt-in system) and I am no worse for wear.
Suffice it to say, I'm a long-time Firefox supporter - I still do use it somewhat frequently but I'm slowly shifting to Brave. I try not to use Chrome (though I appreciate what its impact has been on the browser space as a whole) and Microsoft's efforts with Edge at least provide amusing diversions. If you're running old SharePoint sites, Microsoft's browsers are still a must-have.