So first off, I am only able to rate this on the Firefox page. I really though use Chrome. But this is a really good extension. I have it on my Chromebook and this extension helps me whenever I get an email, and I normally get them a lot. However, every time I restart my Chromebook, all the settings on the extension page including ringtones, accounts sign-in, etc. resets to the default setting. I hope this problem gets fixed soon.