I like the extention, tough there is one flaw I've noticed when Using it with Firefox...
If I rightclick on a word that Grammarly selects to "correct" it there is a 70% chance that the word isn't changed but gramerly pastes the correct spelling at the location where my cursor is... this isn't usefull at all (example, I write "hello, how is you day going" and it should correct you to your, if I would correct that after typing going grammerly would change it to "hello, how is you day goingyour" :/)
Please fix this bug as it makes the application almost unusable and more of a nuisance than anyting else

I am a paying premium user of Grammarly. At first, I was very happy with Grammarly and excited to try it out. I absolutely love the Microsoft Word integration and will continue to use and depend on it. However, when it comes to browsing the web, Grammarly simply does not work or offer much for me since I use Firefox and Firefox Nightly. Grammarly constantly pesters me to log in (it NEVER remembers my login info) and this is a nuisance. More importantly, it lacks important functionality. It simply does not detect simple spelling and grammar errors when I'm writing new social media posts on Facebook and Twitter, and it does not yet have a Google Docs integration/add on. Use Grammarly for its Microsoft Word integration, not the Firefox add on for web browsing -- I like gmbh LanguageTool the best of what I've tried.

Someone should make a popup blocker for this add-on.

Cannot log in.

Barely works correctly.

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.

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

It makes my Gmail super slow and Firefox often shows a popup that it's slowing down my browser generally. Suggestions are also not super useful all the time when compared to the built-in spell-checker.

great app, but I have the same problem as others, that the firefox add-on recognizes that I have a premium account but does not load the correction mode. It would be great if this bug could be fixed soon

Was working well, but now makes the gmail page slw down, Firefox throws up a pop-up asking whether to stop or disable temporarily. Makes gmail unusable

Removes spaces when I'm writing which is very annoying, other than that it is very good at spell checking.

doesn't login and doesn't work as well
"Grammarly is active, but
key features are missing"

Many features only in Pro version.

I tried it and uninstalled. It did not catch an uncapitalized first word in a sentence.

For new users make sure you "auto saved" all your documents every minute as it freezes and crash your web pages very often. When crashed a yellow bar appeared that reads "a script "Grammarly for Firefox" is slowing down your browser, temporary disable or stop it." If you are lucky only one tab crash, if not all and never respond again. Got to turn off power to restart your computer (very annoying).