| Index: lib/windowWrapper.js | 
| =================================================================== | 
| --- a/lib/windowWrapper.js | 
| +++ b/lib/windowWrapper.js | 
| @@ -16,7 +16,7 @@ | 
| let stringBundle = Services.strings.createBundle("chrome://elemhidehelper/locale/global.properties?" + Math.random()); | 
| let result = [stringBundle.GetStringFromName("selectelement.label"), stringBundle.GetStringFromName("stopselection.label")]; | 
| - getMenuItem = function() result; | 
| + getMenuItem = () => result; | 
| return getMenuItem(); | 
| } | 
| @@ -68,7 +68,7 @@ | 
| E: function(id) | 
| { | 
| let doc = this.window.document; | 
| - this.E = function(id) doc.getElementById(id); | 
| + this.E = id => doc.getElementById(id); | 
| return this.E(id); | 
| }, |