Rated 4 out of 5 stars

Από τον/την trlkly στις Δεκ. 3, 2014 · μόνιμος σύνδεσμος

Seems to work well. The missing star is fpr two missing features. First off, you need a button (disabled by default). People who aren't developers are likely to remove Developer Options from their Firefox menu. A separate button is a nice fallback.

Second, you need to fix the table so that the columns can be resized.