Examine source code of markdown-clipper

{
  "manifest_version": 2,
  "name": "markdown-clipper",
  "version": "1.2",
  "author": "Enrico Kaack",
  "description": "This extension works like a web clipper, but it downloads articles in a markdown format. Turndown and Readability.js are used as core libraries. It is not guaranteed to work with all websites.",
  "icons": {
    "16": "/icons/favicon-16x16.png",
    "32": "/icons/favicon-32x32.png",
    "192": "/icons/favicon-192x192.png",
    "512": "/icons/favicon-512x512.png"
  },
  "permissions": [
    "activeTab",
    "tabs",
    "downloads"
  ],
  "browser_action": {
    "default_title": "markdown-clipper",
    "default_icon": {
      "16": "/icons/favicon-16x16.png",
      "32": "/icons/favicon-32x32.png"
    }
  },
  "background": {
    "scripts": [
      "background/turndown.js",
      "background/turndown-plugin-gfm.js",
      "background/Readability.js",
      "background/background.js"
    ]
  }
}