Examine source code of Reddit URL Switch

{
  "manifest_version": 2,
  "name": "Reddit URL Switch",
  "version": "1.0",
  "description": "A simple extension to switch Reddit URLs. Allows the user to switch between old reddit and new reddit with a single click.",
  "content_scripts": [
    {
      "matches": [
        "*://www.reddit.com/*"
      ],
      "js": [
        "script.js"
      ]
    }
  ],
  "permissions": [
    "tabs"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{6da3b8bd-dd3a-4919-b19e-b68391fbce6c}"
    }
  }
}