This is like the best password manager I've ever used. It is well optimized for Firefox, while LastPass that I used previously would turn my browser into a slide-show and constantly cause my whole PC to freeze. None of that applies to Bitwarden. It's extremely fast, and its interface is more convenient. Moreover, it works much better on Android as well, also works in Firefox for Android, while LastPass dumped the support for Firefox for Android long ago. I love this extension and truly recommend it to everyone. Not to mention that Bitwarden is also free for mobile devices.