Firefox Focus only seems to block some ads and isn't configurable to block the many ads and web annoyances that get through.

I also find it annoying that I lose access to my entire Firefox ecosystem on my computer and phone since the focus of the app is actually on anonymous browsing versus blocking ads. If I send tabs to my iPad they still open up in regular Firefox. Firefox Focus only slightly makes the web useable, while giving up most of the browser conveniences.