Firefox icon ist grau und connected nicht mehr

[Lily767]

Hello, 

I use Windows 10 and Kaspersky internet security and I’ve got a problem with my Add-on for Mozilla Firefox. The symbol in my add-on list  is not green anymore, and when i click on it (to show more options) it just loads in an endless loop.

I tried to re-intsall and reactivate it, but to no avail. Options like password-protection or blocking of Youtube ads do not work anymore.

Moreover, Kaspersky just keeps recommending that I install the feature although Firefox says it is installed and activated? 

(And yes, it’s the same problem for every browser.)

It would be nice if someone could help me, i feel a bit lost. (Also, excuse the fact thta I uploaded the German version of this post to this forum as well, it was an accident)