Onlydarksets

I’m trying to limit the non-original content, but this was too good to pass up.

When you want to backtrack a few paces in your web surfing clicktrail but not lose the page you’re on, in Firefox 3, click on your current tab, hold down the Ctrl key and drag it. This will duplicate the tab and keep its history in the copy—that way you can back out and stay where you are in another tab. Sadly this trick only works in Firefox for Windows, not on the Mac.

Source: LifeHacker