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Netflix: pause playback when the tab loses focus

Automatically pauses the player when you switch to another tab so you do not miss any scene.

Code to copy

// Pause the player automatically when you switch to another tab
function pauseHidden() {
  if (!document.hidden) { return; }
  const v = document.querySelector('.watch-video video');
  if (v && !v.paused) { try { v.pause(); } catch (e) {} }
}
document.addEventListener('visibilitychange', pauseHidden);

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.