Examine source code of TestRail OidChecker

{
  "description": "Check Oid",
  "manifest_version": 2,
  "name": "TestRail OidChecker",
  "version": "1.1resigned1",
  "homepage_url": "https://github.com/cernyjan/TestRail-OidChecker",
  "icons": {
    "48": "icons/tick-48.png"
  },
  "browser_action": {
    "default_icon": {
      "16": "icons/tick-48.png",
      "32": "icons/tick-48.png"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "https://testrail.quadient.group/*"
      ],
      "js": [
        "jquery-3.2.1.min.js",
        "TestRail-OidChecker.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{d544852b-c7d3-4e92-80c5-60b078686276}"
    }
  }
}