SnipShot — FireFox Extension

Edit any picture on any webpage with just one right-click, and select Edit in Snipshot and the picture will be brought into the online image editor where you can enhance, crop, resize, rotate or recolor it,and then save it into a variety of formats (GIF, JPG, PDF, PNG, PSD, TIF ) onto your computer or to Flickr or Webshots.
The FireFox Extension works on all version of FireFox, and the Extension is a mere 13KB.

Screenshot of the Online Image Editor.

The Extension can be downloaded from here.