Examine source code of Remove pl.wiki

{
  "manifest_version": 2,
  "name": "Remove pl.wiki",
  "version": "1.0",
  "description": "Automatically follows links to English articles on pl.wikipedia.org.",
  "icons": {
    "48": "icons/removeplwiki.svg",
    "96": "icons/removeplwiki.svg"
  },
  "content_scripts": [
    {
      "matches": [
        "*://pl.wikipedia.org/wiki/*"
      ],
      "js": [
        "forward.js"
      ]
    }
  ]
}