Hi,
If you want to open the links from Favorites in a new tab instead of replacing existing open tab, click on the “blue arrow” at the end of the name of the favorite to open the link in new tab. Or right click on the link and choose open in new tab\new window.
If you want to open in a new tab by a single click, we need installing third party add-on to achieve it.
Download and install
IE7Pro, and then check the Open New Tab from Favorite option. Then, user can always open Favorite in new tab.