mozilla & tabs open

[gustavo halperin <ggh.develop@gmail.com>]

Hello

I have currently Mozilla and Firefox. In Firefox when I click over any 
link with left-button-mouse together with the Ctrl key a new Tab is 
open, but in Mozilla nothing is happen. Also if I use middle-click 
nothing happen.
In the preferences, there aren't nothing specific for this behavior, 
but for example the tab in preferences:
   "TabBrowser Extensions -> Use Tab -> Links -> Middle-click" is 
marking "Open in New Background Tab".

 I don't know, maybe a bug in the TabBrowser Extensions together with 
Mozilla ??

 Thank you in advance,
         Gustavo Halperin