Examine source code of Syncro Element Checker

{
  "manifest_version": 3,
  "name": "Syncro Element Checker",
  "version": "1.1",
  "description": "Warns the user if no assets are present when attempting to resolve ticket.",
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://*.syncromsp.com/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "host_permissions": [
    "https://*.syncromsp.com/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "syncro-asset-checker@dev"
    }
  }
}