code: function addonsManager_isAddonCompatible(aSpec) {
      var spec = aSpec || { };
      var addon = spec.addon;
  
      if (!addon)
        throw new Error(arguments.callee.name + ": Add-on not specified.");
  
      // XXX: Bug 599702 doens't give enough information which type of notification
      return addon.getNode().getAttribute("notification") != "warning";
    }
docs: ///////////////////////////// Add-on section ///////////////////////////// 
  Check if the specified add-on is compatible
  
  @param {object} aSpec
  Information on which add-on to operate on
  Elements: addon - Add-on element
  
  @returns True if the add-on is compatible
  @type {ElemBase}