9-16-21: stopped using it entirely. gui sucks and they won't/cannot update it. Hard to find proxies, none residential. Very few free proxies and often ubearably SLOWWW.
how SLOWWWW can you go, try windscribe and find out.
lousy cumbersome, difficult to use GUI

No cumple con lo indicado. No se conecta con los server proxy de la lista.

No funciona bien en mozila plataforma linux me cambio las ip internas y me deja sin internet lo desconecto y vuelve las ip son dinámicas y se desconecta me dejo esclava la conexcion y se estanca el flujo de lared tiene que se revisada y actualizada

Add-on wont work on mac. Stops all connections and never connects to a server. Wont even show the drop down window when clicking the icon. The desktop app works fine and I will have to stick with that. Extension 1 star, desktop and mobile app 500000000000 stars.

July, 2022. Another dishonest lame "free" vpn. Forgets your login data and then puts you into an endless timeout trying to login. Then if you post a negative review which they richly deserve they will block your access to creating a new account after they lost your old data. Bunch of wankers who cannot program their way out of a paper bag and using the same GUI, which is crappy, slow and unresponsive since their inception probably because they cannot program a new GUI. From memory their speed was always slow and made even slower by the long time it takes them to log you in. THen you must give them youR ACTUAL email address defeating any chance you might have had for privacy. Just another worthess "free" vpn and you get what you pay for. Very small selection of "free proxies" and you have to hunt for them because their gui is so crappy and unresponsive. There is ONLY ONE good vpn free and I aint telling here which one it is. Good luck cuz they all suck save that one and even that one you have to pay if you want very many countries. NONE of them have residential ips so most sites will block you once they see your using a proxy. I guess you have to pay through the nose to get back to the way the net used to be 30 years ago from it's sad state today. An FFox admins you don't have to keep reminding me that I have to download ffox to use it's extension,I already know that, but my reviews are intended to benefit mozille,not evil google
FEB 15, 2021-cannot find our asses with both hands in the dark and a flashlight=cannot find tab. Bullshit time wasting another lame "Free vpn" all these crap vpn extensions, they must recruit from the local homeless shelters.
feb 7, 2021: This company does not listen to reviews or try to fix what's wrong with their add-on. Still the same terrible GUI, hard to navigate, hard to find free proxies, unstable connections. Really don't know why it is rated highly. I am using a competitor free proxy now haven't used windscribe in quite a while but keeping it as backup.
jan 24, 2021: stopped using it. there are NO GOOD FREE VPNS. I've tested them ALL and they ALL suck. This one GUI is very hard to use, slow hard to navigate, free servers difficult to locate. Another lame VPN what else is new.
too much trouble to use it. Hard to connect. User GUI is difficult to use-slow,non-responsive, hard to select. Often have trouble connecting. Lacking sufficient free proxies-hard to use it for free. Found a better vpn free that does not have these problems.

made my browser crash and i removed the addon!

Парадокс. Расширение для борьбы с рекламой встраивает свою рекламу на сайты. В частности, на сайте ВКонтакте появляется бар с рекламой браузера Атом.

the latest addon version on (latest) Firefox is leaking my local DNS IP on some servers (Dallas for example) while working fine on other servers. I've tested on ipleak dot net. The same server does not leak DNS IP on Chrome with Windscribe addon. DNS over TLS/HTTPS is disabled. webrtc it blocked.
EDIT: seems that it only happens when ublock origin is installed.

Fait bugger Firefox dans tous les sens, le ralentit énormément au bout d'un moment. Testé sur plusieurs ordinateurs. Une vraie daube codée avec le cul.

Lags whole browser and then crashes it. Connection is also slow.

Used to work just fine, now it just crashes the whole browser for some reason

Can't get this to work at all. Despite logging into my account it still fails to show username or email address, so I have zero credits. Rubbish.

This piece of garbage add-on hangs and crashes the whole browser, makes it unstable.

Сначала отобрали 50гб каждый месяц навсегда, теперь 2гб в месяц и стало отвратно работать. Если и подключается, что последнее время редкость, то раза с 15 или 20 или вручную к Амстердаму. помойка! Платить нет совершенно никакого желания.