It's a good extension and a great password manager... on PC. On Android it's barely usable as a Firefox extension. To unlock the vault, it opens a window inside the browser, and the only way out of that window is to successfully use autofill or to lock the vault back. If autofill fails, no amount of using the "back" arrow will close the extension window and get you back to your browser and its tabs, you have to fully restart Firefox. Guess I'll have to stick with the Android app instead.