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Discord: mute autoplaying media

Mutes embedded videos and GIFV clips that start their sound on their own as you scroll the chat.

Code to copy

// Mute embedded videos and GIFV clips that autoplay in the chat
function muteMedia() {
  document.querySelectorAll('video, audio').forEach(function (m) {
    if (!m.muted) { m.muted = true; }
  });
}
muteMedia();
const obs = new MutationObserver(muteMedia);
obs.observe(document.body, { childList: true, subtree: true });

How to use this example

1. Copy the code with the button above.
2. Install JustZix (2 minutes) and open the extension on the target page.
3. Add a new rule matching that page.
4. Paste the code into the rule's JavaScript panel and save — it runs on every page visit.