michael@0: function test() {
michael@0:   var contentWin = window.open("about:blank", "", "width=100,height=100");
michael@0:   var enumerator = Services.wm.getEnumerator("navigator:browser");
michael@0: 
michael@0:   while (enumerator.hasMoreElements()) {
michael@0:     let win = enumerator.getNext();
michael@0:     if (win.content == contentWin) {
michael@0:       gPrefService.setBoolPref("browser.tabs.closeWindowWithLastTab", false);
michael@0:       win.gBrowser.removeCurrentTab();
michael@0:       ok(win.closed, "popup is closed");
michael@0: 
michael@0:       // clean up
michael@0:       if (!win.closed)
michael@0:         win.close();
michael@0:       if (gPrefService.prefHasUserValue("browser.tabs.closeWindowWithLastTab"))
michael@0:         gPrefService.clearUserPref("browser.tabs.closeWindowWithLastTab");
michael@0: 
michael@0:       return;
michael@0:     }
michael@0:   }
michael@0: 
michael@0:   throw "couldn't find the content window";
michael@0: }