Great add-on, BUT;
problems with dec 6th 2018 update.
Im Still getting alerts as normal- but when i click the little toolbar "envelope", just will not load.
White "window" appears with blue "loading/Reload" circle - but doesnt load. Waited 5 mins... and still window is white with blue loading circle just spinning and spinning.
Had to roll back to v21.2.3.....
..... Which is working fine.

Win 7 [64bit] - Firefox v56.0.2 [The Last version before Quantum]

Me ha encantado,le doy 5 estrellas

try to re-install... every time :(

Can't hide the obnoxious "Follow Me" wiggling thumb icon without paying. That's BS. Decent app otherwise.

The app is very simple and useful. Kudos man. The only issue I'm facing is that the open in gmail option hasn't been working since the new gmail display update.

Please fix bug with repeated display of email. Every time I start Waterfox/Firefox I keep getting the same notification at bottom right of screen for the same exact emails for the 10th time. It keeps doing this unless you open the email or otherwise mark it as Read. Isn't it should only show the notification one time only, regardless of whether you read it, or there should be an option to ensure that behavior.

I have "Previewing marks as Read" enabled and "Repeat notification"and "Show notifications for older" both disabled with 30 second polling for Primary category for my Google Apps gmail account with the latest v22.2.2.1 for Waterfox on Windows 10 x64.

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Nice interface when you're busy and don't want to stop and open up gmail.