Can't you use the [+] button on the Tab bar to open a new Tab? <br /> Right-click on any Tab and select New Tab? <br /> Or, you can double-click on a blank spot on the Tab bar, if you don't have many Tabs open. If something has changed recently and you lost a feature that you once had, you need to do a little troubleshooting. <br /> Do you have that problem when running in the Firefox SafeMode? <br /> [http://support.mozilla.com/en-US/kb/Safe+Mode] <br /> ''Don't select anything right now, just use "Continue in SafeMode."'' If not, see this: <br /> [http://support.mozilla.com/en-US/kb/troubleshooting+extensions+and+themes]