- by Firefox user 16357656, 4 days agoRated 5 out of 5Just downloaded it and so far -so good. I managed to set a spell check for 4 languages, which is amazing considering that Firefox by default let you check spelling of only one language. I need 4, and the app is seems to be excellent for that.
You have to add the languages in the app settings. Once you've done that, it works well.