User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1b1; .NET CLR 3.5; ffco7) Gecko/20081007 Firefox/3.1b1 Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1b1; .NET CLR 3.5; ffco7) Gecko/20081007 Firefox/3.1b1 New Tab Button Missing From Customize Toolbar Menu, however the new window button is still there Reproducible: Always Steps to Reproduce: 1. Right Click Toolbar 2. Goto Customize 3. There is no longer a new tab button only new window butotn. Actual Results: Nothing, it's not there Expected Results: The new tab button should be there next to the new window button that is there.