Another reason to be glad that Firefox is still standing.
Someone correct me, but can’t ad blockers just be installed through the OS and not be dependent on the browser? I recall this is what I had to do for Safari since there wasn’t a supported extension for the new browser yet. This would lessen our dependency on a browser for ad blocking in this ongoing browser war.
It's better to just not let a browser that's user hostile enough to prevent ad blocking win a browser war.