Examine source code of hcker.news helper

{
  "manifest_version": 3,
  "name": "hcker.news helper",
  "description": "Use Hacker News actions from hcker.news, including votes, favorites, hides, flags, and replies.",
  "version": "0.6.3",
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png",
    "128": "icons/icon-128.png"
  },
  "action": {
    "default_title": "Open this Hacker News page in hcker.news"
  },
  "permissions": [
    "storage"
  ],
  "host_permissions": [
    "https://news.ycombinator.com/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "hcker-news-helper@hcker.news",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://hcker.news/*"
      ],
      "run_at": "document_start",
      "css": [
        "content-scripts/hcker.css"
      ],
      "js": [
        "content-scripts/hcker.js"
      ]
    },
    {
      "matches": [
        "https://news.ycombinator.com/*"
      ],
      "run_at": "document_start",
      "js": [
        "content-scripts/hn.js"
      ]
    }
  ]
}