Nice idea! Not working for me. Rated 1 out of 5 stars
Installed per recommendation/requirement for Leapforce work. The button appears on the toolbar and the requisite entries appear in the context menu, but when it opens a tab, there's no image. I'm running Firefox 20 and the most recent version of the add-on and Java; and I've disabled my antivirus, Firefox pop-up blocker, and ad blocker. Nothing helps.
There's nothing but a link back here on the "awesomescreenshot.com" page and the only readily accessible support on their site consists of forums mostly dedicated to the main toolbar (which requires an account - and really, I'm not linking Diigo to a social media account or establishing one for Diigo until AFTER I get their add-on working) - not even an FAQ page dedicated to this product. I could probably e-mail the developer, but I have a pretty ordinary installation of Firefox and I've looked for what turned out to be nonexistent self-help, so I'm not inclined to do anything more.
Sorry, guys. I'm certainly not contributing or doing anything to help you monetize this or anything else if I have to go through even one hoop to get it to work. Would a FAQ page listing common problems and fixes be too much for you to put out? It'd take, what, twenty minutes to write? Kinda contemptuous of the end user not to.