X: mute autoplaying videos
Keeps every timeline video muted, even when X tries to switch the sound back on.
Code to copy
// Keep all timeline videos muted even when X tries to unmute them
function muteVideos() {
document.querySelectorAll('video').forEach(function (v) {
if (!v.muted) { v.muted = true; }
if (v.volume !== 0) { v.volume = 0; }
});
}
muteVideos();
const obs = new MutationObserver(muteVideos);
obs.observe(document.documentElement, { childList: true, subtree: true });
document.addEventListener('volumechange', muteVideos, true);How to use this example
- Copy the code with the button above.
- Install JustZix (2 minutes) and open the extension on the target page.
- Add a new rule matching that page.
- Paste the code into the rule's JavaScript panel and save — it runs on every page visit.
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