Maybe they could make an addon?
Make an addon that lets you run the older addons?
I stopped using Firefox because Firefox stopped me using it the way I want. Now I use Pale Moon, and someone else benefits from the $thousands I donate every other week ! (I wish)
Firefox lives on the system because there is 1 addon I use every now and then which PM doesn't have yet (should hunt for an equivalent). The next update will probably break that addon anyway. Anyone know a good replacement for Video Download Helper?