Do you know why it's not added to the official directory of Firefox Add-ons?
Dude, don’t leave everyone hanging, spill the beans!
Me? It wasn't rhetorical, I really don't know. But I installed it from GitHub. When I first tried that on my phone, I mistook the popup in question for my device saying it wouldn't do it for security reasons, which made me think I should get it from the Add-Ons directory instead (but couldn't find).
The add-on is encouraging/enabling piracy of paid content. FF and Google will get legal pressure from news publications if they put this in their official stores