Just came across this simple and powerfull tool which is easy to use.
Image editing is a common requirement which come across in your daily need while working.
Her is the tool for it “Aviary Screen Capture”

This tool enables us to simply take screen shots from the firefox and edit the with ease.
we have many features like crop, rotate, resize adding new arrows, draw boxes, draw rectangles etc.
This is simple like a mini photoshop.

Try yourself.
All the best.