Examine source code of Zero Width Shortener

{
  "author": "Jonah Snider",
  "background": {
    "persistent": false,
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": {
      "40": "images/logo-type-round-40.png",
      "192": "images/logo-type-round-192.png"
    }
  },
  "description": "Shortens URLs using spaces that have zero width, making them invisible to humans.",
  "homepage_url": "https://zws.im",
  "icons": {
    "512": "images/logo-512.png"
  },
  "manifest_version": 2,
  "minimum_chrome_version": "42",
  "name": "Zero Width Shortener",
  "offline_enabled": false,
  "permissions": [
    "activeTab"
  ],
  "short_name": "ZWS",
  "version": "1.0.0"
}