Examine source code of Linkdialler

{
  "name": "Linkdialler",
  "version": "2.0.1",
  "description": "Generate number for link",
  "background": {
    "scripts": [
      "js/background.js"
    ]
  },
  "manifest_version": 2,
  "icons": {
    "48": "images/ld48.png",
    "96": "images/ld96.png"
  },
  "browser_action": {
    "default_icon": {
      "16": "images/ld16.png",
      "32": "images/ld32.png",
      "64": "images/ld64.png"
    },
    "default_title": "Generate number for link",
    "default_popup": "linkdialler.html"
  },
  "permissions": [
    "http://*/*",
    "https://*/*"
  ]
}