Great but has some tiny bugs Rated 4 out of 5 stars
This is one of the best screenshot add-ons. You can take screenshots of the entire page, visible page, or just make a selection. Best part of making a selection is the ability to scroll the page while doing so. This is the only add-on I've seen that lets you do that. The default color for the selection's border and background is excellent and is easy to see what you're capturing.
The only things that bother me though is when saving in .jpg format it saves the file as 'jpeg' instead of 'jpg'. If you view files by file type it messes up the order.
Also when capturing a .jpg selection as 'Save As' the default file name ends in .png. So your file explorer and image viewer programs sees the file as a .png even though it's really a .jpg. Kinda annoying. I hope the developer can fixes these tiny issues.