Examine source code of Wikipedia Copy Cleaner

{
  "manifest_version": 2,
  "name": "Wikipedia Copy Cleaner",
  "version": "1.0.1",
  "description": "Removes citation numbers from the clipboard contents when copying from Wikipedia.",
  "icons": {
    "48": "icons/48.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.wikipedia.org/*"
      ],
      "js": [
        "wcc.js"
      ]
    }
  ],
  "permissions": [
    "clipboardWrite"
  ]
}