Examine source code of hnlinks

{
  "manifest_version": 2,
  "name": "hnlinks",
  "version": "0.4.1",
  "description": "Browse links in HackerNews threads, fast!",
  "content_scripts": [
    {
      "matches": [
        "https://news.ycombinator.com/item*"
      ],
      "js": [
        "readmore.js",
        "content.js"
      ],
      "css": [
        "styles.css"
      ]
    }
  ],
  "permissions": [
    "*://hn.algolia.com/api/*"
  ],
  "icons": {
    "64": "icon.png"
  },
  "browser_action": {
    "default_title": "Toggle visibility of the sidebar",
    "default_icon": {
      "64": "icon.png"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "commands": {
    "_execute_browser_action": {
      "suggested_key": {
        "default": "Alt+Shift+8"
      },
      "description": "Toggle visibility of sidebar."
    }
  }
}