Take screen shot of any webpage using Firefox

Sometime we need to take screen shot from webpage.If you use Mozilla Firefox you can easily do this.For this you can use an addon program named Screen grab.Download this addon here and install it.Now restart Firefox.Now go to the webpage from which you want to take screen shot.Right click in mouse and go to Screengrab!>save option.If you want to take screen shot of full page,go to Screengrab!>save>complete webpage frame option and select Screengrab!/save/visible portion.If you want to take screen shot of selected part of the page,right click in mouse and go to Screengrab!/save/selection option and select the portion.Select the location where you want to save screen shot.You can save screen shot as jpg or png format.