1 files changed, 32 insertions, 0 deletions
diff --git a/browser/actors/BrowserTabParent.sys.mjs b/browser/actors/BrowserTabParent.sys.mjs
new file mode 100644
index 0000000000..6915fea8e9
--- /dev/null
+++ b/browser/actors/BrowserTabParent.sys.mjs
@@ -0,0 +1,32 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+const { BrowserWindowTracker } = ChromeUtils.import(
+  "resource:///modules/BrowserWindowTracker.jsm"
+);
+
+export class BrowserTabParent extends JSWindowActorParent {
+  receiveMessage(message) {
+    let browsingContext = this.manager.browsingContext;
+    let browser = browsingContext.embedderElement;
+    if (!browser) {
+      return; // Can happen sometimes if browser is being destroyed
+    }
+
+    let gBrowser = browser.ownerGlobal.gBrowser;
+
+    switch (message.name) {
+      case "Browser:WindowCreated": {
+        gBrowser.announceWindowCreated(browser, message.data.userContextId);
+        BrowserWindowTracker.windowCreated(browser);
+        break;
+      }
+
+      case "Browser:FirstPaint": {
+        browser.ownerGlobal.gBrowserInit._firstContentWindowPaintDeferred.resolve();
+        break;
+      }
+    }
+  }
+}