Super easy to use, very helpful to be able to alter ExpressVPN settings via extension. It's never had any glitches or hiccups and I've been using this in tandem with the app for several months. When I switched from Google Chrome (bleh, amirite?) to Mozilla Firefox, installing the extension took just a few moments. I'm very happy with this extension (and ExpressVPN too!) If you have ExpressVPN you definitely ought to get this extension. It'll save you time and spare you the hassle of needing to minimize your browser any time you want/need to alter ExpressVPN settings/connections/etc. or when you want/need to check on its status.