1 files changed, 14 insertions, 0 deletions
diff --git a/comm/mail/themes/shared/mail/extensionPopup.css b/comm/mail/themes/shared/mail/extensionPopup.css
new file mode 100644
index 0000000000..bf4e615f08
--- /dev/null
+++ b/comm/mail/themes/shared/mail/extensionPopup.css
@@ -0,0 +1,14 @@
+/* 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/. */
+
+.popup-anchor {
+  /* should occupy space but not be visible */
+  opacity: 0;
+  pointer-events: none;
+  position: absolute;
+}
+
+:root[chromehidden~="location"] #header {
+  display: none
+}