Grammarly's Add-on is incredibly unreliable with logins and in no way compatible with Firefox containers or multi-container plugins.

It is really helpful, double tap to access definitions and synonyms is awesome. expect some more basics freemium features.

I have logged into Grammarly through grammarly.com, but the extension does not recognize my log in.

I don't like the way it works

Slows down Firefox massively.

Would give this addon 4 stars, but it is not letting me log in at the moment which is quite annoying considering I use the personal dictionary feature quite often for work. The addon still works though, which is why I'm giving it 2 stars.

Unfortunately it's not allowing me to remain logged in. Very disappointing since I depend on this app for work and school purposes.

Cannot login

Can't log in! I tried to remove and reinstall it, but that is in vain.

It does what it's supposed to. But one feature that would be help full is right, left, up and down arrows like SwiftKey-keyboard have.