I do a lot of websurfing, so when I see a headline like this one, Five Firefox Tips You May Not Know About, I'm always skeptical. But in this case, there actually were five tips that I didn't really know about--and at least one that I've started using constantly.
makeuseof.com looks like an interesting resource for web-oriented stuff; the fact that so much of the web these days is open source is just a sideline. Anyway, those Firefox tips came courtesy of Mark O'Neill, and include my current favorite, switching tabs with a keystroke (instead of mousing): just press Ctrl-Tab to switch from one tab to another.
What's your favorite?
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