Fixes some comments.

JitsiConference.js

     const { config } = this.options;
     const statsCurrentId = config.enableEmailInStats && config.email
         ? config.email : Settings.callStatsUserName;
+    const createRoomOptions = {
+        ...config
+    };
 
     if (config.enableStatsID) {
-        config.statsId = statsCurrentId;
+        createRoomOptions.statsId = statsCurrentId;
     }
 
     this.room = this.xmpp.createRoom(
         this.options.name,
-        config,
+        createRoomOptions,
         JitsiConference.resourceCreator
     );
 
             getWiFiStatsMethod: config.getWiFiStatsMethod
         });
         Statistics.analytics.addPermanentProperties({
-            'callstats_name': aliasName,
-            'user_agent': navigator.userAgent,
-            'browser_name': browser.getName()
+            'callstats_name': aliasName
         });
     }
 

modules/statistics/AnalyticsAdapter.js

     TYPE_UI
 } from '../../service/statistics/AnalyticsEvents';
 import { getLogger } from 'jitsi-meet-logger';
+import browser from '../browser';
 
 const MAX_CACHE_SIZE = 100;
 
     /**
      * Creates new AnalyticsAdapter instance.
      */
-    constructor(options) {
-        this.options = options;
+    constructor() {
         this.reset();
     }
 
          * @type {null}
          */
         this.conferenceName = '';
+
+        this.addPermanentProperties({
+            'user_agent': navigator.userAgent,
+            'browser_name': browser.getName()
+        });
     }
 
     /**