Examine source code of YouTube Redirect

{
  "manifest_version": 2,
  "name": "YouTube Redirect",
  "version": "1.0",
  "description": "Automatically redirects from YouTube's homepage to the subscriptions feed.",
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "*://www.youtube.com/"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{954d5f5d-2919-46e4-bb3f-cd1b3d878461}"
    }
  }
}