Examine source code of Coauthor

{
  "manifest_version": 3,
  "name": "Coauthor",
  "version": "2.1.6",
  "icons": {
    "128": "assets/icon128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://mc.manuscriptcentral.com/*"
      ],
      "run_at": "document_idle",
      "js": [
        "content.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_popup": "./ui/popup/popup.html"
  },
  "web_accessible_resources": [
    {
      "resources": [
        "*.map",
        "assets/*.*",
        "*.css"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{4b3ff91e-9c13-4b2c-a0c0-c5c0f8d1554b}",
      "data_collection_permissions": {
        "required": [
          "authenticationInfo",
          "personalCommunications",
          "websiteContent"
        ],
        "optional": [
          "technicalAndInteraction"
        ]
      }
    }
  },
  "description": "Share your manuscript submission experiences and help increase transparency in academic publishing!",
  "permissions": [
    "cookies",
    "identity"
  ],
  "host_permissions": [
    "*://coauthor.fly.dev/"
  ],
  "key": "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA5EaziQp8N+0QkocGKkfq/AK6AgFpeGtJ+lblHfx3dqFpauY1z3himuj3y7j+jLLsQJdgOvDpzkleD5uB0uzN77tCixdt/7k509nKp/E9XCnFeFRPGC2GTnPndFqesjzvRHdxTlX3dHDTTkvHt1mpo/TXwVkkXtJvcG/ZCZTQFcw2/M7TeYr9iXbM0gcZc8OdwcPehDb+x6p1Spu6SyCiiYCfktMI8tKjSbp+bH/JRa+2iublrazzTkCx+bDvBM9N8AlmYaMVsgiqoaBWheb2bKkBVU91Q78QOMcwAXt1qpqFDcv0rtvsbDS6qcnwJTH/vxwOI6Zkr6kvEa2rt4+gBwIDAQAB"
}