Examine source code of Wikipedia Stable

{
  "manifest_version": 2,
  "name": "Wikipedia Stable",
  "version": "1.0.1",
  "description": "Redirects to the stable version of Wikipedia page.",
  "content_scripts": [
    {
      "matches": [
        "*://*.wikipedia.org/*"
      ],
      "js": [
        "main.js"
      ]
    }
  ]
}