1 files changed, 19 insertions, 0 deletions
diff --git a/comm/mail/base/content/minimizeToTray.js b/comm/mail/base/content/minimizeToTray.js
new file mode 100644
index 0000000000..f65fcc7b43
--- /dev/null
+++ b/comm/mail/base/content/minimizeToTray.js
@@ -0,0 +1,19 @@
+/* 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 docShell, Services, windowState */
+
+addEventListener("sizemodechange", () => {
+  if (
+    windowState == window.STATE_MINIMIZED &&
+    Services.prefs.getBoolPref("mail.minimizeToTray", false)
+  ) {
+    setTimeout(() => {
+      var bw = docShell.treeOwner.QueryInterface(Ci.nsIBaseWindow);
+      Cc["@mozilla.org/messenger/osintegration;1"]
+        .getService(Ci.nsIMessengerWindowsIntegration)
+        .hideWindow(bw);
+    });
+  }
+});