diff --git a/types/chrome-apps/index.d.ts b/types/chrome-apps/index.d.ts
index 24a2142b4d..748e1db4a0 100644
--- a/types/chrome-apps/index.d.ts
+++ b/types/chrome-apps/index.d.ts
@@ -2935,7 +2935,7 @@ declare namespace chrome {
             ports?: Array<integer | integer[]>;
         }
         /** An object which allows the addition and removal of listeners for a Chrome event. */
-        interface Event<T> {
+        interface Event<T extends Function> {
             /**
              * Registers an event listener callback to an event.
              * @param callback Called when an event occurs. The parameters of this function depend on the type of event.
@@ -2997,6 +2997,25 @@ declare namespace chrome {
             hasListeners(): boolean;
         }
 
+        interface EventFilter {
+            [key: string]: string;
+        }
+
+        /**
+         * An object which allows the addition and removal of listeners for a Chrome event.
+         * Also provides the possibility to provide a filter
+         * @template T Callback function.
+         * @template F Filter interface, leave this for default
+         */
+        interface FilteredEvent<T extends Function, F = EventFilter> extends Event<T> {
+            /**
+             * Registers an event listener callback to an event.
+             * @param callback Called when an event occurs. The parameters of this function depend on the type of event.
+             * @param [filter] Optional key/value dictionary you can provide to filter the events
+             */
+            addListener(callback: T, filter?: F): void;
+        }
+
         /**
          * Description of a declarative rule for handling events.
          * @template T Type for conditions array, default: any.
@@ -5203,6 +5222,21 @@ declare namespace chrome {
             /** Metadata for an mDNS advertised service. */
             serviceData: string[];
         }
+
+        /**
+         * Locked to this because it's the only one that can be used.
+         *
+         * const char kEventFilterServiceTypeKey[] = "serviceType";
+         * @see[Source: event_matcher.cc, line 19]{@link https://github.com/chromium/chromium/tree/master/extensions/common/event_matcher.cc}
+         */
+        type ValidServiceTypes = 'serviceType';
+
+        /**
+         * Dictionary
+         * [key in ValidServiceTypes]: string
+         */
+        type ServiceTypes = Record<ValidServiceTypes, string>;
+
         /**
          * The maximum number of service instances that will be
          * included in onServiceList events. If more instances
@@ -5229,8 +5263,12 @@ declare namespace chrome {
          * discovering should be specified as the event filter
          * with the 'serviceType' key. Not specifying an event
          * filter will not start any discovery listeners.
+         * @example
+         * Filter example:
+         * chrome.mdns.onServiceList.addListener(() => { },
+         *  { 'serviceType': 'definitelyTyped._tcp.local' });
          */
-        const onServiceList: chrome.events.Event<(services: Service[]) => void>;
+        const onServiceList: chrome.events.FilteredEvent<(services: Service[]) => void, ServiceTypes>;
 
     }
     // #endregion
@@ -10698,6 +10736,14 @@ declare namespace chrome {
     // #endregion
 
     // #region chrome.webViewRequest
+    /////////////////////
+    // WebView Request //
+    /////////////////////
+    /**
+     * @requires Permissions: 'webview'
+     * @description
+     * Use the *chrome.webViewRequest* API to intercept, block, or modify requests in-flight.
+     */
     namespace webViewRequest {
         type Stage = 'onBeforeRequest' | 'onBeforeSendHeaders' | 'onHeadersReceived' | 'onAuthRequired';
         type DeclarativeWebRequestEventList =
@@ -11295,7 +11341,7 @@ declare namespace chrome {
      * @constructor
      */
     const Event: {
-        new <T = any>(): chrome.events.Event<T>;
+        new <T extends Function>(): chrome.events.Event<T>;
     }
 
     // #endregion
diff --git a/types/chrome-apps/test/index.ts b/types/chrome-apps/test/index.ts
index b2dbc60f0b..dfae00f342 100644
--- a/types/chrome-apps/test/index.ts
+++ b/types/chrome-apps/test/index.ts
@@ -828,7 +828,14 @@ chrome.instanceID; // @todo TODO Tests
 
 chrome.management; // @todo TODO Tests
 
-chrome.mdns; // @todo TODO Tests
+// #region chrome.mdns
+chrome.mdns.onServiceList.addListener(
+    () => { },
+    { 'serviceType': 'definitelyTyped._tcp.local' });
+chrome.mdns.onServiceList.addListener(function (services) {
+    chrome.mdns.forceDiscovery(() => { return true; });
+}, { 'serviceType': '_googlecast._tcp.local' });
+// #endregion
 
 // #region chrome.mediaGalleries
 
@@ -1299,7 +1306,23 @@ chrome.usb.getUserSelectedDevices({
 
 // #endregion
 
-chrome.virtualKeyboard; // @todo TODO Tests
+// #region chrome.virtualKeyboard
+chrome.virtualKeyboard.restrictFeatures(
+    {
+        autoCompleteEnabled: false,
+        autoCorrectEnabled: false,
+        spellCheckEnabled: false,
+        voiceInputEnabled: false,
+        handwritingEnabled: false
+    },
+    (update) => {
+        if (update.autoCompleteEnabled = false) {
+            return true;
+        }
+    }
+);
+// #endregion
+
 chrome.vpnProvider; // @todo TODO Tests
 chrome.wallpaper; // @todo TODO Tests
 chrome.webViewRequest; // @todo TODO Tests
@@ -1383,7 +1406,7 @@ wve.request.onRequest.addRules([rule]);
 
 // #endregion
 
-//#region Embedding & AppView
+// #region Embedding & AppView
 chrome.app.runtime.onEmbedRequested.addListener((request) => {
     request.allow('foobar.html');
 });