add: document.getElementById("allowContextmenuDisable").disabled = state; 
context: function changeDisabledState(state){  //Set the states of the groupbox children state based on the "javascript enabled" checkbox value  document.getElementById("allowScripts").disabled = state;  document.getElementById("allowWindowMoveResize").disabled = state;  document.getElementById("allowImageSrcChange").disabled = state;  document.getElementById("allowWindowStatusChange").disabled = state;  document.getElementById("allowWindowFlip").disabled = state;  document.getElementById("allowHideStatusBar").disabled = state;}
meta: 10234	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/10234/d3ad0e0678fec52ae63c137139734a80bdbdc4aa/pref-scripts.js/clean/suite/common/pref/pref-scripts.js