Five indispensable Firefox tips to get the most out of tabbed browsing,

• Go to Tools, Options, Advanced, Tabbed Browsing -> Uncheck "Hide the tab bar when only one website is open"


• Go to Tools, Options, Advanced, Tabbed Browsing -> Uncheck "Select new tabs opened from links"


• Double click on the tab bar -> Open a new blank tab


• Middle click on an open tab -> Close tab


• Middle click on any link -> Open link in new tab in background

Middle click = click on scroll wheel if you have one instead of an middle mouse button.

If you don't have a scroll mouse, I suggest you get one. If you can't, then Ctrl-clicking does the same thing as middle clicking.

These seem like simple tips but they aren't very prominent in the documentation.