Examine source code of Fingerprint Shield

{
  "manifest_version": 2,
  "name": "Fingerprint Shield",
  "version": "1.1.1resigned1",
  "description": "Browser fingerprinting protection for everybody.",
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "page_action": {
    "default_icon": {
      "19": "icons/icon-19.png",
      "38": "icons/icon-38.png"
    }
  },
  "background": {
    "scripts": [
      "src/background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "src/contentscript.js"
      ],
      "run_at": "document_start",
      "all_frames": true,
      "match_about_blank": true
    }
  ],
  "permissions": [],
  "browser_specific_settings": {
    "gecko": {
      "id": "{87edebac-93fe-4780-8945-598a961b793f}"
    }
  }
}