The best Gmail extension! I use it in my Chrome and Firefox. It's really helpful! Thanks!

Great email checker. Unfortunately, after upgrading to Firefox 58 and selecting the "no tracking" feature, it will not search my email. When I turn the "no tracking" feature off again, it works like a charm. It would be nice if we could use the "no tracking" feature with Check Plus for Gmail.

I love the style and the way it goes with the new firefox design

Works great, (doesn't work with private browsing)

best

goooooooooooooooooooooooooooooooooood

Works better than other extension. UI is much more elegant too. Exactly what I am looking for. Thanks for making this.

This makes my life so much easier. I had it for Google Chrome and I switched to Firefox today. I immediately installed this and the addon is stuck on "Loading settings...." Is this not updated for Quantum? :(

EDIT: Thank you! It's working as intended. <3

Funziona benissimo!

Excellent replacement for Gmail™ Notifier (restartless).

Works perfectly and far cleaner than other similar add-ons. Essential download.

O melhor ate agora.

the best

THE best gmail extension to ever exist. Developer is also top notch and extremely up front. I remember reading a while back about how someone had managed to push a malicious update and you handled it like a pro. Very happy to see this on FF!

Best in it's class. Lots of well thought out options so you configure exactly the way you want. Developer extremely responsive - issues resolved quickly. This isn't one of those extensions that rest on it's laurels and before you know it are showing their age. The entire Checker Plus series of addons are consistently evolving - the developer is always thinking about ways to improve them. The Checker Plus extensions were originally developed for the Chrome browser where they have been very popular for years. This developer took the time and effort to port his extensions early on in the Fx web-extension process. He didn't wait for Fx 57. Highly recommended.