Examine source code of kka

{
  "manifest_version": 2,
  "name": "kka",
  "version": "1.2resigned1",
  "description": "kka user_name print",
  "icons": {},
  "content_scripts": [
    {
      "matches": [
        "*://support.ashisuto.co.jp/*vender*"
      ],
      "js": [
        "jquery.js",
        "kka.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{02a4da71-d993-491e-8919-0a64ff2401ab}"
    }
  }
}