1 files changed, 15 insertions, 0 deletions
diff --git a/toolkit/actors/UnselectedTabHoverParent.sys.mjs b/toolkit/actors/UnselectedTabHoverParent.sys.mjs
new file mode 100644
index 0000000000..797cbd8af2
--- /dev/null
+++ b/toolkit/actors/UnselectedTabHoverParent.sys.mjs
@@ -0,0 +1,15 @@
+/* vim: set ts=2 sw=2 sts=2 et tw=80: */
+/* 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/. */
+
+export class UnselectedTabHoverParent extends JSWindowActorParent {
+  receiveMessage(message) {
+    const topBrowsingContext = this.manager.browsingContext.top;
+    const browser = topBrowsingContext.embedderElement;
+    if (!browser) {
+      return;
+    }
+    browser.shouldHandleUnselectedTabHover = message.data.enable;
+  }
+}