LightShot is an add-on it will allows you to capture selected areas in a browser. It is very simple and easy to use anybody. You can capture any part of web page via simple mouse clicks. You can capture videos and flash part also.
To capture image simple click Lightshot icon on the toolbar or status bar, then select area you want to make a screenshot from and click “Save” button then you can save the image into your computer. When you select your area in lightShot provide a square it will contain its width and height then you can select image’s width and height simply. It provides an option for online editing of images. You can also share images via twitter and facebook directly.
It currently supports png, .bmp, and .jpg formats. It will provide add-ons in Firefox, Chrome, and IE