diff --git a/chrome/page_action_buttons_on_hover.css b/chrome/page_action_buttons_on_hover.css
index 9414b2b..34da185 100644
--- a/chrome/page_action_buttons_on_hover.css
+++ b/chrome/page_action_buttons_on_hover.css
@@ -1,3 +1,5 @@
+/* Page action-buttons "slide in" when cursor is on top of them and don't reserve space when not used */
+
 #page-action-buttons > *[class^=urlbar-icon]{
   margin-inline-end: -26px;
   opacity: 0;