Ok haven't used this exact extension but tried to use their so called portable firefox with built in kproxy extension. Does not work. Mostly cannot connect to their servers and when you are able to connect, data stream so so slow as to be unusable. Just another developer who has bitten off more than he can chew and makes false claims about what his extension does. Also his firefox portable with built in kproxy extension sends everyone your home IP through webrtc leaks. in a word BULLS**it product. Not worth wasting you time over.

The latest version does not work on Firefox version 52. Despite the fact that the developers state in the description of what should work, but it's not. Versions from 3.0 only work on Firefox 57+