Cyberghost VPN for Firefox family doesn't work (tested on Waterfox)... most of the time, when activating it, the switch goes back to off state one second later.

The worst is when the switch works and appears to be activated, it lies, the VPN doesn't work and your IP is exposed, as seen on https://ipleak.net/

This can be disastrous for those that trust blindly without carrying tests, the extension should be taken out from Addons.mozilla.org ASAP!