diff --git a/src/web_accessible_resources/google-ima.js b/src/web_accessible_resources/google-ima.js
index 53fc78d0b7c81..4f7b49d65e9fe 100644
--- a/src/web_accessible_resources/google-ima.js
+++ b/src/web_accessible_resources/google-ima.js
@@ -9,6 +9,10 @@
  * - Modified to avoid jshint warnings as per uBO's config
  * - Added `OmidVerificationVendor` to `ima`
  * - Have `AdError.getInnerError()` return `null`
+ * - Have `AdDisplayContainer` constructor add DIV element to container
+ * - Added missing event dispatcher functionality
+ * - Corrected return type of `Ad.getUniversalAdIds()`
+ * - Corrected typo in `UniversalAdIdInfo.getAdIdValue()` method name
  * 
  * Related issue:
  * - https://github.com/uBlockOrigin/uBlock-issues/issues/2158
@@ -331,8 +335,9 @@ if (!window.google || !window.google.ima || !window.google.ima.VERSION) {
     }
 
     _dispatch(e) {
-      const listeners = this.listeners.get(e.type) || [];
-      for (const listener of Array.from(listeners)) {
+      let listeners = this.listeners.get(e.type);
+      listeners = listeners ? Array.from(listeners.values()) : [];
+      for (const listener of listeners) {
         try {
           listener(e);
         } catch (r) {
@@ -341,16 +346,16 @@ if (!window.google || !window.google.ima || !window.google.ima.VERSION) {
       }
     }
 
-    addEventListener(types, c) {
+    addEventListener(types, c, options, context) {
       if (!Array.isArray(types)) {
         types = [types];
       }
 
       for (const t of types) {
         if (!this.listeners.has(t)) {
-          this.listeners.set(t, new Set());
+          this.listeners.set(t, new Map());
         }
-        this.listeners.get(t).add(c);
+        this.listeners.get(t).set(c, c.bind(context || this));
       }
     }