diff --git a/firefox/user.js b/firefox/user.js
index 094871f..02a35bd 100644
--- a/firefox/user.js
+++ b/firefox/user.js
@@ -26,6 +26,7 @@ user_pref("general.smoothScroll", false);
 user_pref("geo.enabled", false);
 user_pref("geo.wifi.uri", "");
 user_pref("media.autoplay.default", 5);
+user_pref("media.autoplay.blocking_policy", 2);
 user_pref("network.allow-experiments", false);
 user_pref("network.dns.disablePrefetch", true);
 user_pref("network.protocol-handler.external.mailto", false);