LiveDFD Stream Check

Minimal Chrome extension built with Manifest V3.

What it does

This first version checks the active browser tab and reports whether the page appears to be rendering a live video stream.

It also includes a mock detection step: if the sampled live video frame is mostly black, it returns 1; otherwise it returns 0.

It does that by inspecting video elements in the page and looking for signals such as:

• a live MediaStream attached to the element
• current frames being rendered
• playback in progress
• non-zero video dimensions
• a mostly-black frame ratio based on canvas pixel sampling

This is intentionally narrow. It does not yet:

• capture raw tab media
• access the camera device directly
• inspect WebRTC internals
• run your deepfake scoring model
• analyze more than one sampled frame for temporal consistency

Files

• manifest.json: MV3 manifest with the minimum permissions needed for this version
• popup.html: action popup markup
• popup.css: popup styling
• popup.js: active-tab inspection logic

Load locally

1. Open chrome://extensions in Chrome.
2. Enable Developer mode.
3. Click Load unpacked.
4. Select this folder.
5. Open a browser tab with a live video call.
6. Click the extension icon.

Current limitation

Some video-call apps do not expose active media through standard video elements in a way that an injected script can inspect reliably. If that happens, the next step should be a more specific capture path using chrome.tabCapture or an app-specific WebRTC integration.

The mock detector currently samples a single live-looking video element and classifies it as black when at least 85% of opaque sampled pixels have very low luminance.