User-Agent: Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US; rv:1.4a) Gecko/20030307 Build Identifier: Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US; rv:1.4a) Gecko/20030307 If you try to use the File - New - Navigator Tab menu item when there are no browser windows open, nothing happens. Reproducible: Always Steps to Reproduce: 1. Start Mozilla 2. Close any open browser windows 3. Choose: File - New - Navigator Tab Actual Results: Nothing happens. Expected Results: File - New - Navigator Tab should be unavailable if there are no browser windows available. This is probably easiest, and probably makes most UI sense. OR Mozilla should create a new window instead. OR Mozilla should create a new window with a tab window in it. Mozilla doesn't crash.

*** This bug has been marked as a duplicate of 147237 ***