This extension is so great! It not only makes me look better but it is teaching me better grammar at the same time! The ONLY problem with it is that it quits working. This is the second time. Also, sometimes when it is working it's not marking the detected problems visually except for the green icon turning red. I found that if you scan hover the entire document slowly the error/errors will light up. I'm reinstalling it in hopes to jump start it again. If this don't work I'll keep trying until I get it because this extension is GREAT!