Keeps my big fingers from sending out something that looks like a three year old wrote it.

It does what it says it will do, and that's what's important.

Меня все устроило

Ty

Is this extension send text to ge languagetool.org servers for checking?

perfect

Looks a pretty good add-on. However, not working on FF developer 52.0a2 (2016-12-19) (64-bit). Nonetheless could see the LT button on the upper-right bar, nothing but a blank panel appears when clicking the LT button....

Great! If you don't like sending your data to a third party network you can use this add on with a locally hosted instance on your computer or on a private network.

I simply run language tool from the command line like this:

languagetool --http --allow-origin "*"
default port is 8081 but you can specify another one by adding this : --port 666

then in the add on preferences simply change the LanguageTool API Server URL to:
http://localhost:8081/v2/

LanguageTool is a very useful spell- and grammar checker. It is easy to use and open source. A must have if you want to write in a language that is not 100% in your grasp.

The new version significantly improved the usability of this very useful add-on! Keep up the good work!