I don't know exactly when it landed that Firefox mobile gained the ability to install arbitrary extensions but I suggest you walk and don't run in the direction of consent-o-matic
https://addons.mozilla.org/en-US/firefox/addon/consent-o-matic/
I've been waiting for this for a long time (ublock origin has already been available on a preapproved list as of several years ago but if you missed that then obviously grab it too)