Examine source code of BlackHole

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manifest.json

{
  "theme": {
    "images": {
      "theme_frame": "blackholeHeader.jpg"
    },
    "colors": {
      "frame": "#cccccc",
      "tab_background_text": "#cccccc"
    }
  },
  "version": "2.0",
  "name": "BlackHole",
  "manifest_version": 2,
  "description": "Playing with a plasma ball..."
}

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