Rated 4 out of 5 stars

Best screenshot add-on available (to my knowledge ^^), but with a minor annoyance: when using the option "Save>Selection", the add-on injects the following CSS rule into the page:

.content {padding: 1em;}

Thus any element present on the page with the class "content" will be altered by this rule, and thus the site will not really look like it should when the screenshot is taken. Depending on the site, the change can be quite dramatic.

I suppose the add-on uses this class for its inner working, but I would suggest using a more unique class name to avoid such unwanted side-effects (eg ".screengrab-content" or such).

This review is for a previous version of the add-on (0.96.5c.1-signed).