Examine source code of Google Messages Organizer

{
  "manifest_version": 2,
  "name": "Google Messages Organizer",
  "version": "1.0.1",
  "description": "Replaces Google Messages' conversation sidebar with a fully custom organizer — groups, search, custom avatars, themes, and more.",
  "icons": {
    "48": "icon48.png",
    "96": "icon96.png",
    "256": "icon256.png"
  },
  "permissions": [
    "https://messages.google.com/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://messages.google.com/web/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "messages-organizer@tccraftworks.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  }
}