rem: if (gURLBar.value != gLastValidURLStr) 
add: if (gURLBar && gURLBar.value != gLastValidURLStr) 
context: function UpdatePageProxyState(){  if (gURLBar.value != gLastValidURLStr)    SetPageProxyState("invalid", null);}
meta: 5872	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/5872/166bdebbc2c280a8dfff12eb87281e3840e3d577/browser.js/buggy/browser/base/content/browser.js