As every responsible Internet user, I use two-factor authentication (2FA) for my important accounts. For a long time, I depended on Google's Authenticator app, but because early versions of the app weren't backed up to the cloud (not a problem anymore) and because as a Google Android dogfooder I switch devices frequently, I turned to Twilio's Authy, which at the time already supported cloud backup and cross device synchronization. Authy has both iOS and Android apps, and also offered a desktop app, but for whatever reason they shut down the desktop app three years ago. Now every time I needed...