rem: var hasSearch = this.searchbox.repeatTokenClick(aEvent); 
add: var hasSearch = false; if (typeof(this.searchbox.repeatTokenClick) == "function") { hasSearch = this.searchbox.repeatTokenClick(aEvent); }  
context:   this.onFindAgain = function(aEvent) {    var findString = getBrowser().fastFind.searchString;    if (!gFindBar.hidden || gFindBar.hidden && findString != "") {      gFindBar.onFindAgainCommand(aEvent.shiftKey);    }    else {      var hasSearch = this.searchbox.repeatTokenClick(aEvent);      if (!hasSearch) {        gFindBar.onFindAgainCommand(aEvent.shiftKey);      }    }  }
meta: 2588	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/2588/8cc43a8176bd94c77317b0ec821ef8ae0d1fc3b7/overlay.js/clean/src/chrome/content/overlay.js