For some reason Gmail doesn't seem to like this extension. I keep getting "Sign-in attempt prevented" messages from google. The email says
"Someone just tried to sign in to your Google Account firstname.lastname@example.org from an app that doesn't meet modern security standards.
"We strongly recommend that you use a secure app, like Gmail, to access your account. All apps made by Google meet these security standards. Using a less secure app, on the other hand, could leave your account vulnerable. Learn more.
"Google stopped this sign-in attempt, but you should review your recently used devices:"
Interesting though, google's attempts to stop the sign-in fail because I am, and the app is signed in. Goodle occasionally kicks me off and sends me to a page to sign in again.
I suspect google just wants us to use all google stuff but the problem is, they have nothing to replace this-- at least for firefox. Curious, other similar addons I've used don't have this problem.