diff --git a/src/common/header.css b/src/common/header.css
index acd5e7f..ce8d04b 100644
--- a/src/common/header.css
+++ b/src/common/header.css
@@ -1,4 +1,16 @@
-/* WARNING: DO NOT EDIT THE COPY OF THIS FILE LOCATED IN YOUR USER PROFILE!
-   It will be overwritten on upgrade. You should edit the file located in
-   /etc/mobile-config-firefox/ instead (most package managers won't replace
-   files under /etc if they've been edited) */
+/*                  _     _ _                             __ _
+ *  _ __ ___   ___ | |__ (_) | ___        ___ ___  _ __  / _(_) __ _
+ * | '_ ` _ \ / _ \| '_ \| | |/ _ \_____ / __/ _ \| '_ \| |_| |/ _` |
+ * | | | | | | (_) | |_) | | |  __/_____| (_| (_) | | | |  _| | (_| |
+ * |_| |_| |_|\___/|_.__/|_|_|\___|      \___\___/|_| |_|_| |_|\__, |
+ * mobile-config-firefox                                        |___/
+ * https://gitlab.com/postmarketOS/mobile-config-firefox/
+ *
+ * WARNING: DO NOT EDIT THE COPY OF THIS FILE LOCATED IN YOUR USER PROFILE!
+ *
+ * It will be overwritten on upgrade. You should edit the file located in
+ * /etc/mobile-config-firefox/ instead (most package managers won't replace
+ * files under /etc if they've been edited). Or alternatively, consider cloning
+ * mobile-config-firefox.git and editing the separate CSS files there, then
+ * combining them with "make". Patches for useful additions welcome!
+ */