Examine source code of Highlighter

{
  "description": "Highlights all links on Wikipedia",
  "manifest_version": 2,
  "name": "Highlighter",
  "version": "1.0",
  "homepage_url": "https://jut.dev",
  "icons": {
    "48": "icons/48.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.wikipedia.org/*"
      ],
      "js": [
        "highlighter.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{d6ed21cd-dfbf-479d-a586-ce8975014a2a}"
    }
  }
}