Firefox: Close tab with middle mouse-button

Coming from Windows, I was used to open and close tabs in Firefox by middle-clicking (on a link to open a new tab, on a tab-title to close the tab). This is not the default behavior under Linux. Here's how you may change that:

• Enter "about:config" in the address bar and enter "middle" as a filter. (This brings you to Mozilla-Firefox's configuration.)
  
• Double-click on the line reading "middlemouse.contentLoadURL". This should turn the value-column from "true" to "false".

That was quick. (I found this tip here.)