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Instagram: mute autoplaying videos

Forces every autoplaying feed video to stay muted so sound never catches you off guard.

Code to copy

// Keep every autoplaying feed video muted
function muteVideos() {
  document.querySelectorAll('video').forEach(function (v) {
    if (!v.muted) { v.muted = true; }
    v.volume = 0;
  });
}
muteVideos();
const obs = new MutationObserver(muteVideos);
obs.observe(document.body, { childList: true, subtree: true });
document.addEventListener('play', muteVideos, 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.