Examine source code of BingeFlix for Netflix

{
  "manifest_version": 2,
  "name": "BingeFlix",
  "version": "3.1",
  "description": "Auto binge intro for Netflix",
  "icons": {
    "32": "icons/netflixicon.svg",
    "48": "icons/netflixicon.svg",
    "96": "icons/netflixicon.svg"
  },
  "applications": {
    "gecko": {
      "id": "romoli16.rr@gmail.com"
    }
  },
  "browser_action": {
    "default_icon": {
      "32": "icons/netflixicon.png",
      "48": "icons/netflixicon.png"
    }
  },
  "permissions": [
    "tabs",
    "*://www.netflix.com/*",
    "notifications"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*.netflix.com/*"
      ],
      "js": [
        "source.js"
      ],
      "run_at": "document_idle",
      "all_frames": false
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  }
}