diff --git a/browser/components/translation/test/browser_translation_infobar.js b/browser/components/translation/test/browser_translation_infobar.js
index 386f220c834c..4e177ab325a1 100644
--- a/browser/components/translation/test/browser_translation_infobar.js
+++ b/browser/components/translation/test/browser_translation_infobar.js
@@ -29,6 +29,7 @@ class TranslationStub extends TranslationParent {
   constructor(browser) {
     super();
     this._browser = browser;
+    this.actorCreated();
   }
 
   get browser() {
diff --git a/dom/ipc/JSProcessActorParent.cpp b/dom/ipc/JSProcessActorParent.cpp
index 17528b250629..6d52832c6608 100644
--- a/dom/ipc/JSProcessActorParent.cpp
+++ b/dom/ipc/JSProcessActorParent.cpp
@@ -31,8 +31,6 @@ void JSProcessActorParent::Init(const nsACString& aName,
   MOZ_ASSERT(!mManager, "Cannot Init() a JSProcessActorParent twice!");
   SetName(aName);
   mManager = aManager;
-
-  InvokeCallback(CallbackFunction::ActorCreated);
 }
 
 JSProcessActorParent::~JSProcessActorParent() { MOZ_ASSERT(!mManager); }
diff --git a/dom/ipc/JSWindowActorParent.cpp b/dom/ipc/JSWindowActorParent.cpp
index d5dee52ee833..41c4ac4837cc 100644
--- a/dom/ipc/JSWindowActorParent.cpp
+++ b/dom/ipc/JSWindowActorParent.cpp
@@ -31,8 +31,6 @@ void JSWindowActorParent::Init(const nsACString& aName,
   MOZ_ASSERT(!mManager, "Cannot Init() a JSWindowActorParent twice!");
   SetName(aName);
   mManager = aManager;
-
-  InvokeCallback(CallbackFunction::ActorCreated);
 }
 
 namespace {
diff --git a/dom/ipc/tests/JSProcessActor/browser_getActor.js b/dom/ipc/tests/JSProcessActor/browser_getActor.js
index 1f8734a399f9..128579640f92 100644
--- a/dom/ipc/tests/JSProcessActor/browser_getActor.js
+++ b/dom/ipc/tests/JSProcessActor/browser_getActor.js
@@ -2,35 +2,15 @@
    http://creativecommons.org/publicdomain/zero/1.0/ */
 "use strict";
 
-const ACTOR_PARENT_CREATED_NOTIFICATION = "test-process-actor-parent-created";
-
-function promiseNotification(aNotification) {
-  const { Services } = ChromeUtils.import(
-    "resource://gre/modules/Services.jsm"
-  );
-  let notificationResolve;
-  let notificationObserver = function observer() {
-    notificationResolve();
-    Services.obs.removeObserver(notificationObserver, aNotification);
-  };
-  return new Promise(resolve => {
-    notificationResolve = resolve;
-    Services.obs.addObserver(notificationObserver, aNotification);
-  });
-}
-
 declTest("getActor on both sides", {
   async test(browser) {
-    let parentCreationObserved = promiseNotification(
-      ACTOR_PARENT_CREATED_NOTIFICATION
-    );
     let parent = browser.browsingContext.currentWindowGlobal.contentParent;
     ok(parent, "WindowGlobalParent should have value.");
     let actorParent = parent.getActor("TestProcessActor");
     is(
       actorParent.show(),
       "TestProcessActorParent",
-      "actor show should have value."
+      "actor show should have vaule."
     );
     is(
       actorParent.manager,
@@ -38,34 +18,20 @@ declTest("getActor on both sides", {
       "manager should match WindowGlobalParent.contentParent"
     );
 
-    await parentCreationObserved;
-    ok(true, "Parent creation was observed");
-
-    await SpecialPowers.spawn(
-      browser,
-      [promiseNotification.toString()],
-      async function(promiseNotificationSource) {
-        const ACTOR_CHILD_CREATED_NOTIFICATION =
-          "test-process-actor-child-created";
-        let childCreationObserved = new Function(promiseNotificationSource)(
-          ACTOR_CHILD_CREATED_NOTIFICATION
-        );
-        let child = ChromeUtils.contentChild;
-        ok(child, "WindowGlobalChild should have value.");
-        let actorChild = child.getActor("TestProcessActor");
-        is(
-          actorChild.show(),
-          "TestProcessActorChild",
-          "actor show should have vaule."
-        );
-        is(
-          actorChild.manager,
-          child,
-          "manager should match ChromeUtils.contentChild."
-        );
-        await childCreationObserved;
-        ok(true, "Child creation was observed");
-      }
-    );
+    await SpecialPowers.spawn(browser, [], async function() {
+      let child = ChromeUtils.contentChild;
+      ok(child, "WindowGlobalChild should have value.");
+      let actorChild = child.getActor("TestProcessActor");
+      is(
+        actorChild.show(),
+        "TestProcessActorChild",
+        "actor show should have vaule."
+      );
+      is(
+        actorChild.manager,
+        child,
+        "manager should match ChromeUtils.contentChild."
+      );
+    });
   },
 });
diff --git a/dom/ipc/tests/JSProcessActor/head.js b/dom/ipc/tests/JSProcessActor/head.js
index f37462ec8b77..1bd14c1dfaf7 100644
--- a/dom/ipc/tests/JSProcessActor/head.js
+++ b/dom/ipc/tests/JSProcessActor/head.js
@@ -17,21 +17,6 @@ let processActorOptions = {
   },
 };
 
-function promiseNotification(aNotification) {
-  const { Services } = ChromeUtils.import(
-    "resource://gre/modules/Services.jsm"
-  );
-  let notificationResolve;
-  let notificationObserver = function observer() {
-    notificationResolve();
-    Services.obs.removeObserver(notificationObserver, aNotification);
-  };
-  return new Promise(resolve => {
-    notificationResolve = resolve;
-    Services.obs.addObserver(notificationObserver, aNotification);
-  });
-}
-
 function declTest(name, cfg) {
   let { url = "about:blank", remoteTypes, fission, test } = cfg;
 
diff --git a/dom/ipc/tests/JSWindowActor/browser_getActor.js b/dom/ipc/tests/JSWindowActor/browser_getActor.js
index ed26f5a61622..f0cc80e8f80a 100644
--- a/dom/ipc/tests/JSWindowActor/browser_getActor.js
+++ b/dom/ipc/tests/JSWindowActor/browser_getActor.js
@@ -2,69 +2,25 @@
    http://creativecommons.org/publicdomain/zero/1.0/ */
 "use strict";
 
-const ACTOR_PARENT_CREATED_NOTIFICATION = "test-window-actor-parent-created";
-
-function promiseNotification(aNotification) {
-  const { Services } = ChromeUtils.import(
-    "resource://gre/modules/Services.jsm"
-  );
-  let notificationResolve;
-  let notificationObserver = function observer() {
-    notificationResolve();
-    Services.obs.removeObserver(notificationObserver, aNotification);
-  };
-  return new Promise(resolve => {
-    notificationResolve = resolve;
-    Services.obs.addObserver(notificationObserver, aNotification);
-  });
-}
-
 declTest("getActor on both sides", {
   async test(browser) {
-    let parentCreationObserved = promiseNotification(
-      ACTOR_PARENT_CREATED_NOTIFICATION
-    );
     let parent = browser.browsingContext.currentWindowGlobal;
     ok(parent, "WindowGlobalParent should have value.");
     let actorParent = parent.getActor("TestWindow");
     is(actorParent.show(), "TestWindowParent", "actor show should have vaule.");
     is(actorParent.manager, parent, "manager should match WindowGlobalParent.");
 
-    await parentCreationObserved;
-    ok(true, "Parent creation was observed");
-
-    await SpecialPowers.spawn(
-      browser,
-      [promiseNotification.toString()],
-      async function(promiseNotificationSource) {
-        const ACTOR_CHILD_CREATED_NOTIFICATION =
-          "test-window-actor-child-created";
-        let childCreationObserved = new Function(promiseNotificationSource)(
-          ACTOR_CHILD_CREATED_NOTIFICATION
-        );
-
-        let child = content.windowGlobalChild;
-        ok(child, "WindowGlobalChild should have value.");
-        is(
-          child.isInProcess,
-          false,
-          "Actor should be loaded in the content process."
-        );
-        let actorChild = child.getActor("TestWindow");
-        is(
-          actorChild.show(),
-          "TestWindowChild",
-          "actor show should have vaule."
-        );
-        is(
-          actorChild.manager,
-          child,
-          "manager should match WindowGlobalChild."
-        );
-
-        await childCreationObserved;
-        ok(true, "Child creation was observed");
-      }
-    );
+    await SpecialPowers.spawn(browser, [], async function() {
+      let child = content.windowGlobalChild;
+      ok(child, "WindowGlobalChild should have value.");
+      is(
+        child.isInProcess,
+        false,
+        "Actor should be loaded in the content process."
+      );
+      let actorChild = child.getActor("TestWindow");
+      is(actorChild.show(), "TestWindowChild", "actor show should have vaule.");
+      is(actorChild.manager, child, "manager should match WindowGlobalChild.");
+    });
   },
 });
diff --git a/toolkit/actors/TestProcessActorChild.jsm b/toolkit/actors/TestProcessActorChild.jsm
index 9c3aa98585bd..73955e134eb4 100644
--- a/toolkit/actors/TestProcessActorChild.jsm
+++ b/toolkit/actors/TestProcessActorChild.jsm
@@ -13,13 +13,6 @@ class TestProcessActorChild extends JSProcessActorChild {
     super();
   }
 
-  actorCreated() {
-    const { Services } = ChromeUtils.import(
-      "resource://gre/modules/Services.jsm"
-    );
-    Services.obs.notifyObservers(null, "test-process-actor-child-created");
-  }
-
   receiveMessage(aMessage) {
     switch (aMessage.name) {
       case "toChild":
diff --git a/toolkit/actors/TestProcessActorParent.jsm b/toolkit/actors/TestProcessActorParent.jsm
index 6b6805b61df1..41e5b2492808 100644
--- a/toolkit/actors/TestProcessActorParent.jsm
+++ b/toolkit/actors/TestProcessActorParent.jsm
@@ -11,12 +11,7 @@ class TestProcessActorParent extends JSProcessActorParent {
     super();
     this.wrappedJSObject = this;
   }
-  actorCreated() {
-    const { Services } = ChromeUtils.import(
-      "resource://gre/modules/Services.jsm"
-    );
-    Services.obs.notifyObservers(null, "test-process-actor-parent-created");
-  }
+
   receiveMessage(aMessage) {
     switch (aMessage.name) {
       case "init":
diff --git a/toolkit/actors/TestWindowChild.jsm b/toolkit/actors/TestWindowChild.jsm
index 071d989bf60e..104282e5bd78 100644
--- a/toolkit/actors/TestWindowChild.jsm
+++ b/toolkit/actors/TestWindowChild.jsm
@@ -13,13 +13,6 @@ class TestWindowChild extends JSWindowActorChild {
     super();
   }
 
-  actorCreated() {
-    const { Services } = ChromeUtils.import(
-      "resource://gre/modules/Services.jsm"
-    );
-    Services.obs.notifyObservers(null, "test-window-actor-child-created");
-  }
-
   receiveMessage(aMessage) {
     switch (aMessage.name) {
       case "toChild":
diff --git a/toolkit/actors/TestWindowParent.jsm b/toolkit/actors/TestWindowParent.jsm
index d5d5604df81b..6e3078bf7514 100644
--- a/toolkit/actors/TestWindowParent.jsm
+++ b/toolkit/actors/TestWindowParent.jsm
@@ -14,13 +14,6 @@ class TestWindowParent extends JSWindowActorParent {
     this.wrappedJSObject = this;
   }
 
-  actorCreated() {
-    const { Services } = ChromeUtils.import(
-      "resource://gre/modules/Services.jsm"
-    );
-    Services.obs.notifyObservers(null, "test-window-actor-child-created");
-  }
-
   receiveMessage(aMessage) {
     switch (aMessage.name) {
       case "init":