Googlepedia

Shows you a relevant Wikipedia article along with your search results. Clicking links in the article will trigger new Google searches, making it a very useful research tool.

Features include: Turns internal Wikipedia links into Google search links; Uses Google's I'm Feeling Lucky(tm) feature to find relevant articles; Links images directly to their full-sized versions; Removes Google AdWords; Can be expanded to take the full width of the page; Uses your local language Wikipedia based on the Google language; And hide button to disable Googlepedia.

Requirements:

Firefox: 1.5 - 4.0b2pre