The Grammarly addon is broken for WordPress.com online editor. I have a really bad experience on Grammarly ever since I shifted to Quantum from Chrome. On Chrome it worked just fine, but here it needs more work. Hope the developers patch this.

Not as good as LT, which catches more errors and do not need registration.

Well, it's not bad either, I'll give it a 3-star.

excellent

One of my favorite add-ons. Works great and is essential for writing in Firefox!

Its cool

Grammarly for Firefox works as well as it does on most other platforms except for Desk.com. When I use it at desk.com as an agent it will create this blank white space above where I type that covers the email address sections so I am unable to change anything. I know it's grammarly because if I disable to extension the white space covering the To: section goes away.

It's a really helpful extension and it corrects a lot of stuff that I usually just leave as is and forget about, I highly recommend this even to people who think they are experts at grammar, because I thought I didn't need it but a lot of mistakes have been caught by it and proven me wrong.

Worked Great with Chrome! Testing it out on Firefox...

It is fine when it kicks in automatically but it sometimes doesn't work even though it is turned on.

Good app

The best option out there, a real shame is not available in more languages.