Vulnerability protection query

Hi, I want to know if the Firefox extension called vulnerability protection is worth enabling. I believe it has always been disabled since I installed norton but I just remembered about it the other day when I was going through my Firefox add-ons. I’m guessing that it was disabled by default, is that because it is not useful/bad to use or is it just because of the way Firefox requires you to enable a add-on manually? I read that at some point it was actually disabled automatically by Firefox because of comparability issues. Do those issues still exist and is it worth turning on?

Thanks.