Examine source code of FreeTube Redirect

{
  "manifest_version": 2,
  "name": "Freetube Redirect",
  "version": "0.2resigned1",
  "description": "Redirects YouTube links to FreeTube.",
  "icons": {
    "48": "icons/iconColor.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "redirect.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{094ea743-3bac-4d74-8c55-be1eb07119d1}"
    }
  }
}