Examine source code of Franchisify

{
  "manifest_version": 2,
  "name": "Franchisify",
  "version": "1.4resigned1",
  "description": "For those people who are offended by the very mention of the English football franchise in Milton Keynes - it replaces the offensive references with a more palatable description on selected web pages (e.g. BBC Sport, Sky Sports, EFL).  If 'they' don't like it - perhaps it's time to drop the Dons from their name.",
  "icons": {
    "48": "icons/ic_transform_black_48dp_1x.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.bbc.co.uk/sport/*",
        "*://*.skysports.com/*",
        "*://*.efl.com/*",
        "*://*.afcwimbledon.co.uk/*",
        "*://*.mkdons.com/*",
        "*://*.facebook.com/*",
        "*://*.standard.co.uk/*",
        "*://*.wupgb.co.uk/*"
      ],
      "js": [
        "franchisify.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{7bee7cd1-2b2a-43c3-872a-6849ee7fff2f}"
    }
  }
}