You can Add Screenshots in your posts to better explain your Posts. Below you can find 5 Addons to take Screenshots of Webpages. I have tried all these Addons and they are best ones
4 Firefox Addons for Capturing WebPages
It is a Firefox Extension that creates Screenshots of WebPages. Unlike other extensions, this plugin provides a set of editing & annotation tools, which let users quickly modify web capture & insert Text Annotations & Graphical Annotations.
2. Grab Them All
This Extension take Screenshots of sites specified in external file & write them as .JPG or .PNG file to be selected Directory.
With this Addon, you can copy, save, share or even edit your final grabs- including any image or background.
4. Pearl Crescent Page
Save an image of Webpage to File. Options allow you to control the output format, image file name, scaling and much more.