Examine source code of Browser Games

{
  "name": "Browser Games",
  "browser_specific_settings": {
    "gecko": {
      "id": "thisisfortestinginfirefox@example.com"
    }
  },
  "version": "0.0.12",
  "description": "Browser Games",
  "permissions": [
    "activeTab",
    "storage",
    "tabs",
    "geolocation",
    "*://*/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "manifest_version": 2,
  "icons": {
    "32": "icons/32x32.png",
    "64": "icons/64x64.png",
    "128": "icons/128x128.png"
  }
}