I've been contemplating switching back to Firefox from Chrome due to the upcoming changes to ad blockers - Is Brave a good choice for this, or should I go back to FF?
Despite Mozilla's organizational woes, Firefox remains the one true "free as in free speech" browsers out there that has remained competitive. I'm of the opinion that we need Firefox to keep the Web open.
Plus, and this is somewhat beside the actual browser, I like that the Brave org is toolmaking focused, vs. Mozilla's activism schtick where they say they're just fine with platforms' algorithms getting tuned to favour sources the Mozilla activist people like. That was the straw that broke the camel's back for me.
(Brave is not the only toolmaking focused org - see eg. Vivaldi. Both companies, insofar as they have politics, have politics of user control and privacy and leave the other stuff at the door, and it shows even in their marketing copy being more straightforward and less slimy than Mozilla's modern output)
Firefox is also a solid option. Firefox is one of the few stable options remaining to use a non-Chromium based browser. Most popular Chrome extensions have Firefox releases as well so you may not even lose that functionality in a switch.
Advocates for Firefox frequently point out that part of how we got here with the Manifest v3 issues is by consolidating browser technologies. Chrome, Brave, Edge, etc all use the Chromium core which is part of what gives Google such a strong ability to influence web technology developments to their advantage and our detriment. If this is something you care about then it may be worth voting with your feet and giving Firefox a chance.
I decided to give Brave a try because it's Chromium-based. It's been great. I did have to modify a few settings to get the look/feel how I like, but it I found it easy, and I expect others may not care. Brave shields block ads without the need of extensions like ublock. I don't have any complaints so far.