10/10

does what it says on the tin. it notifies you when you have unread emails. HOWEVER, recently there was an update that locked MANY previously free features behind a $20 USD paywall (despite the fact that the popup CLAIMS you can donate ANY amount, i guess $19 and lower doesn't count as any).
These features aren't anything advanced either, any and all customization, changing what buttons appear on the popup, the works. Way shittier add-on. Use only as a notification bell that opens gmail and nothing else.

Good addon but leaving the placeholders for premium only features in menus is a dick move. Promptly removed.

This is a good extension! I would definitely recommend it, but I have to complain. Why are you expecting us to donate just to get extra features that shouldn't even be put behind a paywall? I know you want people to donate, but don't put simple things such as themes and being able show or hide specific buttons behind a paywall, it's just not worth it. I would only put the more advanced features behind the paywall. (Also I'm rating this one star since it seems like the dev doesn't want to reply to anyone.)

:D

...

Works perfectly, it's really helpful having multiple accounts and being able to mark read/unread/delete is convenient