So you've discovered the joys of tabbed browsing. Now how do you quickly cycle through open tabs?

In Safari and Firefox this is a piece of cake. Pressing Command-Shift-Left Arrow (or Right Arrow) in Safari will cycle through all your open tabs.

In Firefox its Command-1 through to Command-9, for the first nine tabs at least. Confusingly these are the same shortcuts Safari uses for the first nine bookmarks. If you have more than nine tabs open, Control-Page Up and Control-Page Down Will let you scroll through them.