Работает!
Смотрите сами: https://whoer.net/

Exactly does what it says it will do. Ends surreptitious circumvention of your VPN IP addresses.

Hhhh

Fix

Отлично работает ;>
Спасибо Разработчикам>

I picked up this extension at the recommendation of my VPN service. While I cant really tell if its working (I'll assume it is), it doesnt seem to negatively impact FF's performance.

Thank your for your work! Keep up!

不知道是否有效，测试下先

Good and simple.

needed this bad! Thank you!

не работает

The developer had the good foresight to listen to Mozilla and update their add-on, before the final release of Firefox 57. As a result, it is completely compatible.

Работает.