diff --git a/toolkit/themes/shared/media/videocontrols.css b/toolkit/themes/shared/media/videocontrols.css
index 4973edfc414b..011cd7b97877 100644
--- a/toolkit/themes/shared/media/videocontrols.css
+++ b/toolkit/themes/shared/media/videocontrols.css
@@ -71,7 +71,8 @@
 .controlBar[hidden] .progressBar,
 .controlBar[hidden] .bufferBar,
 .pictureInPictureToggleButton[hidden],
-.videocontrols[inDOMFullscreen] > .controlsContainer > .controlsOverlay > .pictureInPictureToggleButton {
+.videocontrols[inDOMFullscreen] > .controlsContainer > .controlsOverlay > .pictureInPictureToggleButton,
+.videocontrols[inDOMFullscreen] > .controlsContainer > .controlsOverlay > #pictureInPictureToggleExperiment {
   display: none;
 }