Examine source code of Modern Python Docs

{
  "manifest_version": 2,
  "name": "Modern Python Docs",
  "version": "1.0",
  "description": "Redirects all Python 2 doc pages to the matching Python 3 page.",
  "content_scripts": [
    {
      "matches": [
        "*://docs.python.org/2*"
      ],
      "js": [
        "redirect.js"
      ]
    }
  ]
}