Examine source code of Wikipedia Everywhere

{
  "manifest_version": 3,
  "name": "Wikipedia Everywhere",
  "version": "1.0.0",
  "description": "Turn any text on the web into a Wikipedia preview.",
  "default_locale": "en",
  "permissions": [
    "storage"
  ],
  "host_permissions": [
    "https://*.wikipedia.org/*"
  ],
  "background": {
    "scripts": [
      "common/constants.js",
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "common/constants.js",
        "common/i18n.js",
        "content/content.js"
      ],
      "css": [
        "content/content.css"
      ]
    }
  ],
  "options_ui": {
    "page": "options/options.html",
    "open_in_tab": true
  },
  "icons": {
    "48": "icons/icon48.png",
    "96": "icons/icon96.png"
  },
  "action": {},
  "browser_specific_settings": {
    "gecko": {
      "id": "wikipedia-everywhere@barricachlorissinica.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}