Issue 7284 - Move CSS escaping to createStyleSheet

lib/filterClasses.js

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-present eyeo GmbH
  *
  * Adblock Plus is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 3 as
  * published by the Free Software Foundation.
  *
  * Adblock Plus is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 1342 matching lines @@
 }
 exports.ElemHideBase = ElemHideBase;
 
 ElemHideBase.prototype = extend(ContentFilter, {
   /**
    * CSS selector for the HTML elements that should be hidden
    * @type {string}
    */
   get selector()
   {
-    // Braces are being escaped to prevent CSS rule injection.
-    return this.body.replace("{", "\\7B ").replace("}", "\\7D ");
+    return this.body;
   }
 });
 
 /**
  * Class for element hiding filters
  * @param {string} text see {@link Filter Filter()}
  * @param {string} [domains]  see {@link ElemHideBase ElemHideBase()}
  * @param {string} selector see {@link ElemHideBase ElemHideBase()}
  * @constructor
  * @augments ElemHideBase
@@ skipping 63 matching lines @@
 
   /**
    * Script that should be executed
    * @type {string}
    */
   get script()
   {
     return this.body;
   }
 });