Examine source code of What's New on GitHub

{
  "manifest_version": 3,
  "name": "What's New on GitHub",
  "version": "3.0.1",
  "description": "See what's new and what's not in your GitHub dashboard's feeds and in your organizations' feeds.",
  "icons": {
    "48": "icon/48.png",
    "128": "icon/128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://github.com/",
        "https://github.com/dashboard",
        "https://github.com/orgs/*/dashboard"
      ],
      "js": [
        "index.js"
      ],
      "run_at": "document_end"
    }
  ],
  "permissions": [
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{a66968ab-490c-43b9-ba9e-f9a561f13a24}"
    }
  }
}