A must-have addon ! Rated 5 out of 5 stars
Version 2.8.2 needs NPAPI plugin, so I'm using 3.0.0 which works fine [Firefox 15.0]. Light GUI, user-friendly, fast, what else do you want?
It has everything I was looking for, just amazing!
** Just an idea: would be great to have the option of remembering the size and position of the selection **