rem: getWebNavigation().goForward(); 
add: try { getWebNavigation().goForward(); } catch(ex) { } 
context: function BrowserForward(){  getWebNavigation().goForward();  UpdateBackForwardButtons();}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/e6ab922193cbeb49c5031b05b08730ab5850d09e/navigator.js/clean/xpfe/browser/resources/content/navigator.js