| Index: lib/utils.js | 
| =================================================================== | 
| --- a/lib/utils.js | 
| +++ b/lib/utils.js | 
| @@ -321,28 +321,20 @@ let Utils = exports.Utils = | 
| } | 
| } | 
| } | 
| } | 
| return selectedItem; | 
| }, | 
| /** | 
| - * Pauses code execution and allows events to be processed. Warning: | 
| - * other extension code might execute, the extension might even shut down. | 
| + * DEPRECATED, do not use! | 
| */ | 
| yield: function() | 
| { | 
| - let {Prefs} = require("prefs"); | 
| - if (Prefs.please_kill_startup_performance) | 
| - { | 
| - this.yield = function() {}; | 
| - return; | 
| - } | 
| - return new Promise((resolve, reject) => Utils.runAsync(resolve)); | 
| }, | 
| /** | 
| * Saves sidebar state before detaching/reattaching | 
| */ | 
| setParams: function(params) | 
| { | 
| sidebarParams = params; |