Examine source code of Impervious

{
  "manifest_version": 2,
  "name": "Impervious",
  "version": "0.2.2resigned1",
  "author": "ejjeffrey",
  "description": "A privacy extension.",
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "all_frames": true,
      "js": [
        "canvas.js",
        "menu.js"
      ],
      "run_at": "document_start"
    }
  ],
  "permissions": [
    "<all_urls>"
  ],
  "icons": {
    "48": "icon48.png",
    "96": "icon96.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{cde9595d-cd49-4e69-ba83-96b624f554cb}"
    }
  }
}