diff --git a/chrome/overlay_fullscreen_toolbars.css b/chrome/overlay_fullscreen_toolbars.css
index a09f1af1..defb4611 100644
--- a/chrome/overlay_fullscreen_toolbars.css
+++ b/chrome/overlay_fullscreen_toolbars.css
@@ -1,6 +1,8 @@
 /* Source file https://github.com/MrOtherGuy/firefox-csshacks/tree/master/chrome/overlay_fullscreen_toolbars.css made available under Mozilla Public License v. 2.0
 See the above repository for updates as well as full license text. */
 
+/* Makes toolbars appear as overlay instead of pushing down the website in fullscreen mode */
+
 @media (-moz-bool-pref: "browser.fullscreen.autohide"){
   #navigator-toolbox[inFullscreen]{
     position: fixed !important;