Examine source code of ProxyUB

{
  "manifest_version": 2,
  "name": "ProxyUB",
  "version": "1.0.0",
  "description": "Adds a redirect banner for sites that can be accessed using the University Libary Proxy",
  "icons": {
    "48": "icons/proxy-48.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.link.springer.com/*",
        "*://*.ieeexplore.ieee.org/*",
        "*://*.dl.acm.org/*",
        "*://*.sciencedirect.com/*"
      ],
      "js": [
        "proxy-ub.js"
      ]
    }
  ],
  "web_accessible_resources": [
    "html/banner.html"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{52548b4d-041a-4535-841d-cb51c241e1e2}"
    }
  }
}