Index: lib/elemHideEmulation.js
===================================================================
--- a/lib/elemHideEmulation.js
+++ b/lib/elemHideEmulation.js
@@ -17,17 +17,16 @@
 
 "use strict";
 
 /**
  * @fileOverview Element hiding emulation implementation.
  */
 
 const {ElemHideExceptions} = require("./elemHideExceptions");
-const {Filter} = require("./filterClasses");
 
 let filters = new Set();
 
 /**
  * Container for element hiding emulation filters
  * @class
  */
 let ElemHideEmulation = {
@@ -40,39 +39,38 @@
   },
 
   /**
    * Add a new element hiding emulation filter
    * @param {ElemHideEmulationFilter} filter
    */
   add(filter)
   {
-    filters.add(filter.text);
+    filters.add(filter);
   },
 
   /**
    * Removes an element hiding emulation filter
    * @param {ElemHideEmulationFilter} filter
    */
   remove(filter)
   {
-    filters.delete(filter.text);
+    filters.delete(filter);
   },
 
   /**
    * Returns a list of all rules active on a particular domain
    * @param {string} domain
    * @return {ElemHideEmulationFilter[]}
    */
   getRulesForDomain(domain)
   {
     let result = [];
-    for (let text of filters.values())
+    for (let filter of filters)
     {
-      let filter = Filter.fromText(text);
       if (filter.isActiveOnDomain(domain) &&
           !ElemHideExceptions.getException(filter.selector, domain))
       {
         result.push(filter);
       }
     }
     return result;
   }