Googlepedia is simple and doesn’t take much getting used to. All it does is search both Google and Wikipedia simultaneously and throw up the Wikipedia page on the right (were AdWords usually are), perfect for Googlers who often end up clicking on Wikipedia entries anyway.
To be fair the add-on has been around for a while, we just didn’t know it existed until a report in the Washington Post tipped us off earlier this morning. There are probably tons of wonderful applications for Firefox that no one knows about. Have you guys discovered any gems among the masses of add-ons? Let us know in the comments below!