Examine source code of Intercom Tag Checker

{
  "description": "Checks for tags in Intercom conversations",
  "manifest_version": 2,
  "name": "Intercom Tag Checker",
  "version": "1.21",
  "homepage_url": "https://github.com/Gunnyarts/intercom-tag-checker-for-firefox/",
  "icons": {
    "128": "icons/logo_128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://app.intercom.io/*",
        "*://app.intercom.io/*"
      ],
      "js": [
        "tag-checker.js"
      ],
      "css": [
        "tag-checker.css"
      ]
    }
  ]
}