*Press the Shift key while an entry in the drop down list is highlighted to disable "Switch to Tab" and see the URL. *Use the cursor Right key to select an item marked as Switch to Tab in the drop down list and copy the URL to the location bar. *Open the URL in a new tab by using Alt + Enter on the highlighted entry. *Open the URL in the current tab by using Shift + Enter on the highlighted entry. ---- If you use a system restore then you have the risk that not all files are reverted to previous versions and you most likely have corrupted your Firefox installation.<br /> You will have to do a clean reinstall of Firefox and delete the Firefox program folder (C:\Program Files\Mozilla Firefox\).<br /> Your personal data is stored in the Firefox profile folder and won't be affected by a reinstall, but make sure not to remove personal data if you uninstall Firefox. *Firefox 8.0.x: http://www.mozilla.com/en-US/firefox/all.html *Firefox 3.6.x: http://www.mozilla.com/en-US/firefox/all-older.html