By far the best gmail addon I've used (especially since the previous one I tried didn't allow changing labels, which is a major part of my workflow). There's not much that can be said as for the large part, it "just works" as expected (and with a good feature set). Perhaps if there's one criticism it's how a variety of actions can't be done from the toolbar window and will instead open a new tab (slower). Still, it's the best gmail addon I've used, so view it worth 5 stars compared to its competition.

Simply the best email checker! Easy to use.

Best gmail checker I have used yet.

Can't work if turn the tracking protection to "always"

solved

Super rapide et conviviale, par contre je n'arrive pas à trouver l'aide ou la FAQ l'onglet reste vide

Great extension. Just started using it on firefox. First I had it on chrome

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)