For many reasons, it needs to be screen shot of a web page. By using the add-on Screen-grab of popular web software Mozilla Firefox can take specific portion, selected portion or full page screen shot. After collecting the screen shot save file in .jpg or .png format. You can download this add-on from the following link:
http://addons.mozilla.org/ en-US/firefox/addon/1146 And you get update information from
www.screengrab.org. After installing this software, restart your Firefox program and visible a ‘screen-grab’ icon. Now, which page you want to take screen shot, right click on this page and click the ‘status screen grab’ icon and also click the ‘save’ button. Now click on the ‘complete page/Frame’, saving dialog box will appear. Besides you can click ‘Visible portion’ to customize or take screen shot how much portion you want to take from a page.