Grammarly is a great tool to have.

I do not have the premium version, yet the free version remains helpful in catching common typos. While I may disagree with some of its suggestions, I find this extension most helpful in ensuring most of my web communication is free of typos and contextual errors. I dislike, however, having to sign-in to the program each web session. What a hassle. Otherwise, a valuable extension.

Grammarly for the average user is probably an excellent experience, but for someone such as myself, while I find it to be better than most, it is still only ok. For one its dictionary is highly limited, in my Grammarly reports reports I allegedly use more unique words than more than 90% of their users. Mind you I write a lot about science and often when they highlight a word and I check it via Google it is Grammarly that is incorrect. I also find their understanding as far as "context' goes to be somewhat limited to pedantic statements. What I have found it good for is correcting typos and cerrtain grammar errors

I've used Grammarly for Firefox and have found it to be in the top 3 of the best programs I've used. It's unbelievably easy to use. I can't recommend it enough.

helpful, easy to install and to use.
a good help