New-found Firefox extension

I just discovered this Firefox extension: it allows you to highlight text in a web page and treat that text as a URL for opening in a tab or window. That in itself is nice, so I don't have to go through the old "Ctrl-C Ctrl-T Ctrl-V Enter" routine to open these links, but the best part is the fact that you can set up custom URL generators. For instance, I added one for "en.wikipedia.org/wiki/*" where the * is replaced by whatever I highlight. So if I see a word or phrase and want to look it up in Wikipedia, all I have to do is highlight it and right-click.