diff --git a/extension/content-script.js b/extension/content-script.js
--- a/extension/content-script.js
+++ b/extension/content-script.js
@@ -258,6 +258,13 @@
         sendPlayerInfo(player, "waiting");
     });
 
+    // playlist is now empty or being reloaded, stop player
+    // e.g. when using Ajax page navigation and the user nagivated away
+    player.addEventListener("emptied", function () {
+        // could have its own signal but for compat it's easier just to pretend to have stopped
+        sendPlayerInfo(player, "stopped");
+    });
+
     // opposite of "waiting", we finished buffering enough
     // only if we are playing, though, should we set playback state back to playing
     player.addEventListener("canplay", function () {