For you folks who never heard of Greasemonkey, well, it is a Firefox extension, more like an extension for developers. This is due to it's function which allows users to apply javascripts to web pages without even adding a code to the page. All you need is a premade javascript or a javascript that you have written on your own and then with Greasemonkey, apply it to any web pages you like. But, how is this thing useful for tech beginners or people who hell doesn't know how to code javascripts or even better, never heard to javascript at all. As i have mentioned above, all you need is a premade javascript code. Just follow this article as i show you how to use Greasemonkey and a particular javascript code to preview images in almost any webpages (Flickr, Google Images, deviantART etc ) without even requiring to reload the page. Ain't that cool or what? (if it is not, you really need to get your geeky gene checked up :) )