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Validation

Validation confirms that the extension parses correctly and that the WebRTC and YouTube behaviors run as expected.

Prerequisites

  • Node.js, Python 3, and Chrome are installed.
  • The repository is available on the local machine.

Run static checks

Run the following commands from the repository root after any source change:

python3 -m json.tool manifest.json >/dev/null
node --check src/service-worker.js
node --check src/webrtc-blocker.js
node --check src/youtube-quality.js

All four commands must exit without error.

Verify browser behavior

To load the extension and confirm runtime behavior in Chrome:

  1. Open chrome://extensions and enable developer mode.
  2. Click Load unpacked and select the repository root.
  3. Confirm WebRTC behavior:
    • Open a WebRTC leak test page.
    • Confirm that no local IP address appears.
    • In the page console, run new RTCPeerConnection() and confirm that the call throws.
  4. Confirm YouTube behavior:
    • Open a YouTube video that exposes 4k or 8k.
    • Confirm that the player moves to the highest exposed quality.
    • Navigate to another video in the same tab and confirm that enforcement runs again.

Known limitations

  • The YouTube page player methods are private, and the YouTube team can change the methods at any time.
  • The extension does not automate the YouTube quality menu.
  • The extension does not provide a runtime disable switch.