Examine source code of Gitnotate

{
  "manifest_version": 3,
  "name": "Gitnotate",
  "version": "0.2.0",
  "description": "Sub-line commenting for Markdown files in GitHub PR reviews. Highlight specific words and phrases, not just lines.",
  "homepage_url": "https://github.com/pedrofuentes/gitnotate",
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "permissions": [
    "activeTab",
    "storage"
  ],
  "host_permissions": [
    "https://github.com/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://github.com/*"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "assets/browser-extension.css"
      ]
    }
  ],
  "background": {
    "service_worker": "service-worker.js"
  },
  "action": {
    "default_popup": "src/popup/popup.html",
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png"
    }
  },
  "update_url": "https://edge.microsoft.com/extensionwebstorebase/v1/crx"
}