I'd like to switch but not at the cost of giving up the add-ons.
Yes.
Palemoon is a fork of the pre-new-UI of Firefox and uses the old Xul extensions but those are harder to find these days (though you can still find them - you have to go to the individual websites to do so). I like palemoon a lot but it’s getting long in the tooth.
Brave is based on Google’s chromium back end (but has no google tracking) and you can use any of the extensions in the google store. (go to menu - extensions - click on web store)
Brave has built in privacy and ad-blocking though I also use an extension called ScriptSafe which acts like NoScript did for FireFox - there’s also uOrigin for chrome too.
Brave also goes out of their way to try to stop the Youtube ads too!
brave.com/download
Brave was started by the lead developer at Firefox after he was ousted from Firefox because he donated to prop 8 in California to stop gay marriage!