rem: if (browser.mTabContainer.childNodes.length > 1) { 
add: if (browser.tabContainer.childNodes.length > 1) { 
context: function BrowserCloseTabOrWindow(){  var browser = getBrowser();  if (browser.mTabContainer.childNodes.length > 1) {    // Just close up a tab.    browser.removeCurrentTab();    return;  }  BrowserCloseWindow();}
meta: 8395	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/8395/4f8a9cbb1247fdc49001ba0c52048359bda229f0/navigator.js/clean/xpfe/browser/resources/content/navigator.js