Examine source code of HackerNewsDarkV3

{
  "manifest_version": 3,
  "name": "HackerNewsDark",
  "description": "A nice, readable, dark theme for Hacker News.",
  "version": "0.11.3",
  "icons": {
    "16": "icons/16.png",
    "48": "icons/48.png",
    "128": "icons/128.png"
  },
  "permissions": [],
  "host_permissions": [
    "*://news.ycombinator.com/*"
  ],
  "background": {
    "page": "background.html"
  },
  "content_scripts": [
    {
      "css": [
        "css/style.css"
      ],
      "js": [
        "js/main.js"
      ],
      "matches": [
        "*://news.ycombinator.com/*"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{647d2098-b33e-4f3b-80ed-76ec89fba5a2}",
      "strict_min_version": "109.0"
    }
  }
}