Remember when add-ons used to be to extend the featureset of Firefox, rather than restore what was taken away for no reason? Yes. Firefox devs are like 10 pounds of shit in a 9-pound bag..
Gotta use add-ons to fix half-assed broken add-ons that were once working. Because changes were made for change's sake and no good reason. It's like they need something to do so they break things.