Examine source code of HackerNews bookmark

{
  "manifest_version": 2,
  "name": "HackerNews bookmark",
  "description": "Add in-site bookmark tab for Hacker News, bookmark discussion, post for later",
  "version": "1.0",
  "icons": {
    "16": "y1816.png",
    "32": "y1832.png",
    "48": "y1848.png",
    "128": "y18.png"
  },
  "content_scripts": [
    {
      "js": [
        "content.js"
      ],
      "css": [
        "style.css"
      ],
      "matches": [
        "https://news.ycombinator.com/*"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{004701be-6d3e-4fbc-8692-7f13a36457b8}"
    }
  }
}