To try the thousands of add-ons available here, download Mozilla Firefox, a fast, free way to surf the Web!
CloseWelcome to Firefox Add-ons.
Choose from thousands of extra features and styles to make Firefox your own.
CloseReview for Grammar and Spell Checker — LanguageTool by Jonathan Perry-Houts
Rated 5 out of 5 stars
LanguageTool is a mediocre grammar checker. I can't say I recommend the paid license, but the free plan is a welcome step up from vanilla spell checkers.
This add-on is excellent, however. Very responsive, and well designed. Only limited by the capabilities of LanguageTool itself.
Note, that you should be comfortable trusting a third-party with your privacy before using this tool. You can self-host the LanguageTool service, but by default it will send all of your composed email contents through the LanguageTool public API.
To create your own collections, you must have a Mozilla Add-ons account.