If you can't have plugins on the browser (for Android) then you might as well use chrome (which is not planned for EOL and is faster and secure). My "grrr I hate google" tendencies are satisfied by not logging into any google stuff on chrome and using duckduckgo whilst on chrome. I accept that chrome is - privacy issues notwithstanding - faster and better (supported) than firefox, and I put up with firefox because of the addons, but without addons it's just a slower chrome.
This sounds a bit like FUD since Firefox on Android is faster than Chrome for me. Your wording also implies it's insecure, which I don't think is a correct evaluation.
That said, I do find Mozilla's behaviour on this quite saddening.