If you’re frustrated with Firefox you could give Brave Browser a try. The devs forked off of Chromium and removed all of the tracking that Google wants in there. It comes pre-loaded with all of the Ad-blocking features I use in Firefox as well, so no extensions needed for that. Also you’ll still be able to use the Chromecast feature if you really want to go in and re-enable it.

The only thing you’ll want to do is to switch the Homepage off and probably disable the icon at the top for enrolling in their ad rewards program (which handles the problems that a lot of users here have with Brave).