UPDATE

Just updated my laptop to Ubuntu 22.04.1

ExpressVPN firefox extension now no longer recognizes ExpressVPN is installed. Followed all instructions on ExpressVPN site and removed Firefox and reinstalled following their instructions. Extension still not finding the installed (and working) Express VPN app.

I can control ExpressVPN from command line so the app still works; just the connection from the Firefox Extension is now broken following upgrade.

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ExpressVPN Very easy to use, very reliable and very little overhead. Pretty much everything I need. Installing the Firefox addon just makes it even easier to control the VPN client without leaving the browser