Examine source code of HN Keyboard Boost

{
  "manifest_version": 3,
  "name": "HN Keyboard Boost",
  "version": "0.1.2",
  "description": "Minimal keyboard navigation for Hacker News.",
  "content_scripts": [
    {
      "matches": [
        "https://news.ycombinator.com/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "hn-keyboard-boost@jessesoo",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      },
      "strict_min_version": "109.0"
    }
  }
}