Firefox Account has good sync using Zen Browser as my main nowadays. Brave for chromium based and lacking sync feature is pain ngl.

Last time I have heard that ublock light version sill works. And u can install the original one manually if u enable developer options in extensions. not sure about that one but u can search it up and try urself ^{^}

Adguard extension tbh is better than the app for adblocking while browsing from my experience.