http://www.ehow.com/how_2290131_enable-tabs-internet-explorer.html
1. Open Internet Explorer. First, by clicking on the Internet Explorer icon.
2. Then click on "TOOLS" link and scroll down to "Internet Options".
3. Once in the "Internet Options", stay in "GENERAL" tab and scroll down to Change how Webpages are displayed in tabs" and click on the "SETTINGS" button .
4. Go down to "When a pop-up is encountered:" and chose "always open pop-ups in a new tab"
5. Go down to "Open link from other programs in" and chose "A new in the current window"
6. Click on
Now Internet Explore will work like FireFox!