Shift+LeftClick opens links in a new active tab 0.1.1-signed No Restart
by Romik Forest
This simple addon has only this functionality, nothing else: it opens links in a new active tab with Shift+LeftClick (left mouse button click), not in a new window
Mainly for users, who used this shotcut in other browsers (e.g. Opera 12).
This add-on is not compatible with your version of Firefox because of the following: