rem: gBrowser.selectedTab = gBrowser.addTab('about:blank'); setTimeout("gURLBar.focus();", 0); 
add: var homePage = getHomePage(); var uriToLoad = homePage[0]; gBrowser.selectedTab = gBrowser.addTab(uriToLoad); var navBar = document.getElementById("nav-bar"); if (uriToLoad == "about:blank" && !navBar.hidden && window.locationbar.visible) setTimeout("gURLBar.focus();", 0); else setTimeout("content.focus();", 0); 
context: function BrowserOpenTab(){  if (!gInPrintPreviewMode) {    gBrowser.selectedTab = gBrowser.addTab('about:blank');    setTimeout("gURLBar.focus();", 0);   }}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/9fe7431540ea0d0a83c0e1cbd117c84b695f5be0/navigator.js/clean/xpfe/browser/resources/content/navigator.js