I have three browsers. Firefox, Chrome and Opera ,all in their latest versions . I use ZenMate addon for vpn. Since latest update of firefox(from 52) i just can't use any vpn(ZenMate or otherwise) on firefox. They just don't work. Intersting thing is that same vpn works perfectly fine in my chrome/opera in same HP laptop,windows 7 os and college wifi. Basically problem is specifically about firefox. I have unistalled and re-installed firefox from sctrach,many times. It doesn't solve anything. There is also the problem that i constantly need to prove that i am human. Same site doesn't ask me to prove that in chrome for example. It has became irritating honestly. I love firefox and i am used to it but it has became downright unusable since latest updates. What should i do?