FireShot is a great extension for Firefox, which helps you to capture full webpage in Firefox entirely. It isn’t just a web page capture tool. FireShot is also a good tool for quick editings and annotations.

This demo shows some basic operations you can apply to your captures.

The capture can be quickly annotated and:

• Uploaded
• Saved as PDF/PNG/GIF/JPEG/BMP
• Sent to clipboard
• Printed
• E-Mailed
• Exported

Watch how to use by video:

Get this extension for your Firefox here: http://addons.mozilla.org/en/firefox/addon/fireshot/