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25 essential Firefox add-ons for power users. A bare copy of Firefox is a wonderful thing, but when you start stuffing it with add-ons it gets even better.
So what are the best add-ons for power users? Here's our top 25: 1. All-in-one Sidebar All-in-one Sidebar makes Firefox's Sidebar more useful by displaying pretty much anything you might want: source code, downloads, add-ons, page info, entire web pages…