Rated 1 out of 5 stars

*Really* disappointed with this. A lot of words are missing, and there's too much of a focus on classic, standard English rather than words borrowed from the United States.
Desperately needs an update, and there are some fantastic ready-to-go word lists out there. A shame that something used by almost a million people is so mediocre. Fix it, Mozilla!

This review is for a previous version of the add-on (1.19.1).