Good but some issues Rated 3 out of 5 stars
It's good, but some issues:
1. Why I can't move the Capture button around?
2. The menu that appears when I click on the arrow next to Capture button looks awkward, need to be streamlined.
3. The appearance of the Capture button also need to fit better Firefox general theme and UX guidelines.
4. It would be nice if you make a light version that doesn't contain image uploading.
5. The 'Options' dialog accessible from Add-ons Manager is incomplete and doesn't list all the possible options that one can see in the Capture menu.
That's all :-)