Examine source code of Code tours Github

{
  "name": "Code tours Github",
  "version": "0.0.6",
  "description": "Allows to run code tours in your browser",
  "manifest_version": 2,
  "minimum_chrome_version": "60",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "https://render.githubusercontent.com/*",
    "https://github.com/*"
  ],
  "icons": {
    "128": "code-tour.png"
  },
  "content_scripts": [
    {
      "run_at": "document_start",
      "matches": [
        "https://github.com/*/*"
      ],
      "js": [
        "github.js"
      ]
    }
  ],
  "web_accessible_resources": [
    "code-tour.png"
  ]
}