Rated 2 out of 5 stars

AdrienneA, you're lucky - it hasn't worked for me in FF since last year!

Are you using Windoze? I'm on a Mac, and it's it worthless in FF, but works fine in Safari and another app that lets me open webpages. The scrolling works great in Safari, unfortunately I rarely use Safari. So when I find a page in FF that I want a screenshot of, I must open either Safari or the other app and load the page there.
Even on a new FF profile this extension wouldn't work, even though it was installed fresh - not copied from old profile.

This user has a previous review of this add-on.