Let's begin.There are more than 7,000 Firefox extensions in Mozilla's official catalog, and a good portion of them can drastically improve how you browse the Web. Then there are the stinkers. These add-ons that actually make the browser slower, or harder to use. We've compiled a list of 20 that you should steer clear from, if only for their lack of basic utility.
Well, you never now who might find use for one of these...