Examine source code of Mturk Tab Cycler

{
  "name": "Mturk Tab Cycler",
  "version": "1.2",
  "description": "Automatically cyles to the next active mturk HIT in window on submit.",
  "permissions": [
    "tabs"
  ],
  "icons": {
    "48": "rp128.png",
    "128": "rp128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "content_scripts": [
    {
      "matches": [
        "*://worker.mturk.com/projects/*?assignment_id*"
      ],
      "js": [
        "mturk.js"
      ]
    }
  ],
  "manifest_version": 2
}