Examine source code of hanopener

{
  "manifest_version": 2,
  "name": "hanopener",
  "version": "1.1resigned1",
  "description": "Open Top 30 Newest / Top Posts from Hacker News",
  "browser_action": {
    "default_icon": "hanopener.png"
  },
  "permissions": [
    "https://hacker-news.firebaseio.com/*"
  ],
  "background": {
    "scripts": [
      "hanopener.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{26cca688-8877-4124-b26b-c46949726245}"
    }
  }
}