I love the Firefox custom keywords feature, and the way it's used to do quick searches. Firefox comes with one for Wikipedia, where "w" is a short-cut like this:
It works pretty well. The problem is that Wikipedia URLs are case-sensitive. So if I type "w jimmy durante", I get to a page which has helpfully capitalized Jimmy, but left durante alone, so that the page is not found, and I'm stuck at an oh-so-close Not Found page.
But I noticed that if I type "jimmy durante" into the search box, it takes me directly to the Jimmy Durante page. So I redefined my Wikipedia quick search:
Now if I have the title correct except for case, I get taken straight to the page I want, and if the page doesn't exist, I at least see close matches. Much better.