I like that they don’t foce apps on me , I’d rather install what I need myself. F-droid is not the best app as I see it. I use neo store so do not want extra bloat.
Regarding Firefox , you are either running chrome/vanadium or chrome/vanadium plus Firefox. Since webview. So what you have with Firefox is at best the in use browser features. Open a link in an app and you still use the webview. Firefox on android has it issues as well (sandboxing) . So 1+1 = 2 issues. Using a VPN / DNS with adblock makes ublock unnecessary.