Examine source code of TT TK

{
  "manifest_version": 2,
  "name": "TT TK",
  "version": "14.0",
  "description": "This is an extension that does TT TK.",
  "icons": {
    "48": "icons/border-48.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://www.facebook.com/*"
      ],
      "js": [
        "fbauto.js"
      ]
    }
  ]
}