Examine source code of Enhanced HN

{
  "manifest_version": 2,
  "name": "Enhanced HN",
  "version": "1.1.3",
  "description": "Enhanced HN is a suite of tools that enhance your HackerNews browsing experience",
  "icons": {
    "48": "hacker-news.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://news.ycombinator.com/*"
      ],
      "js": [
        "enhanced_hn.js"
      ],
      "css": [
        "enhanced_hn.css"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{189ad19c-880d-4ffc-b7b4-042f28dc8d2a}"
    }
  }
}