I have been extremely happy with GrapheneOS. The built-in browser includes ad blocking, although it is not as good as uBlock Origin.
While RCE attacks and Firefox 0days do exist, I think the privacy improvements outweighs the anti-exploit benefits provided extra layers of sandboxing.
That said, Firefox does seem to be rolling out Fission on Android, which brings hope that site isolation may come soon so that we can have both benefits at the same time.
Banking and Credit Unions are a breeze for me. Grok is a no-go. Frustrating, given that's where all of xAI's new features go.
Way better than stock Android or iOS, which are basically spyware by design.