I don't know why I didn't look for this before. Maybe I did but I didn't find anything very good. Anyhoo...
I've just discovered an excellent plugin for Firefox, called Fireshot.
(Geeky stuff ahead) When you're applying for jobs as a web designer, it would seem logical to make sure that it shows you in a good light.
If you browse the web using Firefox (and if not, why not? Get it here!), you've probably noticed the search box on the top-right of the Firefox window. You can add custom search engines to this list, so you can search a particular website straight from your browser, instead of having to go to the website you want to search first.