God I wish chrome didn't remove manifest v2 
Here is the list of things that piss me off about firefox:
- It is dogshit slow
- It eats up a ludicrous amounts of RAM, which I wasn't expecting since it's one of the main things people make fun of chrome for
- It crashes constantly
- It tries to push it's "AI" bullshit on me despite me turning it off on multiple occasions
- It puts ads on my home page
- It needs to be relaunched regularly because at some point it becomes too laggy to use. It even stops loading pages altogether
- "Restore previous session" feature doesn't work half the time so restarting the browser is absolutely terrifying
- Profile management is a mess
Are there any alternatives? Is Brave any good?
I have adguard and technitium dns on my home server to block ads/bypass censorship. Is there anything else that's good to have?
Those are good options. You should be able to find the domains serving ads/ai and block them. I've never seen an ad in Firefox other than their getpocket shit which i just block with DNS and disable in the app.
You can also plug one of these resolvers directly into the browser to nuke things at that level (adguard might offer this too I've never used it) https://controld.com/free-dns