Examine source code of Reddit URL Redirector

{
  "manifest_version": 2,
  "name": "Reddit URL Redirector",
  "version": "1.0",
  "description": "Redirects Reddit URLs from subdomain format to standard format",
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "*://*.reddit.com/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{85b15e8c-3a7f-4207-99e1-8112ed8597ef}"
    }
  }
}