Examine source code of LibProxy

{
  "manifest_version": 2,
  "name": "LibProxy",
  "version": "1.1",
  "description": "Automatically loads Publications and Articles through a OpenURL Library proxy",
  "icons": {
    "48": "icon48.png",
    "96": "icon96.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.mitpressjournals.org/*",
        "*://*.degruyter.com/*",
        "*://*.onlinelibrary.wiley.com/*",
        "*://*.link.springer.com/*",
        "*://*.taylorfrancis.com/*",
        "*://*.taylorandfrancis.com/*",
        "*://*.oxfordre.com/*",
        "*://*.oxfordbibliographies.com/*",
        "*://*.journals.sagepub.com/*",
        "*://*.cambridge.org/*",
        "*://*.tandfonline.com/*",
        "*://*.jstor.org/*",
        "*://*.academic.oup.com/*",
        "*://*.heinonline.org/*"
      ],
      "js": [
        "proxy.js"
      ]
    }
  ],
  "options_ui": {
    "page": "options.html"
  },
  "permissions": [
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "libproxy@keirl.uk"
    }
  }
}