User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10) Gecko/2009042316 Firefox/3.0.10 If we open a more than one tab,then if try to close the tab by using clt +W it is working fine with the tab ,after closing all the tabs the main window is not closing by using clt + w Reproducible: Always Steps to Reproduce: 1.Open more then on tab 2.Close all the tabs by clt +w 3.Now close the main window by clt + w Actual Results: Issue : the main window is not able to close by using the key clt +w Expected Results: By using the clt +w the main window must be closed From file menu we can close by clt +w