Examine source code of Wayback Wiki

{
  "name": "Wayback Wiki",
  "version": "1.2.0",
  "manifest_version": 3,
  "description": "Surf Wikipedia on a specific date in the past.",
  "icons": {
    "16": "img/icon-16.png",
    "48": "img/icon-48.png",
    "128": "img/icon-128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.wikipedia.org/wiki/*",
        "*://*.wikipedia.org/w/*"
      ],
      "js": [
        "waybackwiki.js"
      ],
      "css": [
        "waybackwiki.css"
      ],
      "run_at": "document_start"
    }
  ],
  "action": {
    "default_title": "Wayback Wiki",
    "default_popup": "popup/options.html",
    "default_icon": {
      "16": "img/icon-16.png",
      "32": "img/icon-32.png"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{c144d8ae-e0e4-4606-b02d-6acb678c074b}"
    }
  },
  "permissions": [
    "storage",
    "activeTab"
  ],
  "homepage_url": "https://github.com/daattali/wayback-wiki-extension"
}