1 files changed, 31 insertions, 0 deletions
diff --git a/toolkit/mozapps/extensions/internal/Content.js b/toolkit/mozapps/extensions/internal/Content.js
new file mode 100644
index 0000000000..7296309cf2
--- /dev/null
+++ b/toolkit/mozapps/extensions/internal/Content.js
@@ -0,0 +1,31 @@
+/* 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/. */
+
+/* globals addMessageListener*/
+
+"use strict";
+
+(function() {
+  var { Services } = ChromeUtils.import("resource://gre/modules/Services.jsm");
+
+  const MSG_JAR_FLUSH = "AddonJarFlush";
+  const MSG_MESSAGE_MANAGER_CACHES_FLUSH = "AddonMessageManagerCachesFlush";
+
+  try {
+    if (
+      Services.appinfo.processType !== Services.appinfo.PROCESS_TYPE_DEFAULT
+    ) {
+      // Propagate JAR cache flush notifications across process boundaries.
+      addMessageListener(MSG_JAR_FLUSH, function(message) {
+        Services.obs.notifyObservers(null, "flush-cache-entry", message.data);
+      });
+      // Propagate message manager caches flush notifications across processes.
+      addMessageListener(MSG_MESSAGE_MANAGER_CACHES_FLUSH, function() {
+        Services.obs.notifyObservers(null, "message-manager-flush-caches");
+      });
+    }
+  } catch (e) {
+    Cu.reportError(e);
+  }
+})();