It has an extremely annoying frequent updates. They seem as whenever any juvenile programmers wrote a single line of code, they ask you for update screening.

The only advantage they have over most other screenshot add-ons is that they allow scrolling screenshot. But that comes often with buggy functionality. This add-on freezes often on Firefox and stops working as opposed to other screenshot add-ons.

If you don't need a scrolling screenshot add-on, I recommend, you take a more reliable add-on.