|I have found a solution (I had to create a new post, cause the old 1 was closed on this issue).|
You have to do the following: Step 1, Make sure, all toolbars are removed from your computer (like Ask toolbar). you can do it by using windows control panel, ( inside, programs and services, select the ones u want to remove, than click on "remove"), or using other programs, like Revo uninstaller.
Step 2, Install Tab Mix Plus to Firefox (also works with firefox 5.0).
Step 3, Inside FIrefox, go to Tools/Tab Mix Plus options, inside Click on "Events" Click to Load to new page, and select the option you like (for inst. "Homepage"), Click on "Apply"