Examine source code of CyberChef.org

{
  "manifest_version": 3,
  "name": "CyberChef",
  "description": "The Cyber Swiss Army Knife — your pinned tools in a popup, the full app in a tab. Entirely offline.",
  "icons": {
    "16": "icons/16.png",
    "32": "icons/32.png",
    "48": "icons/48.png",
    "128": "icons/128.png"
  },
  "action": {
    "default_popup": "app/popup.html",
    "default_title": "CyberChef",
    "default_icon": {
      "16": "icons/16.png",
      "32": "icons/32.png"
    }
  },
  "permissions": [
    "storage",
    "scripting",
    "contextMenus"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "content_security_policy": {
    "extension_pages": "script-src 'self' 'wasm-unsafe-eval'; object-src 'self'; worker-src 'self'; child-src 'self'"
  },
  "version": "0.1.4",
  "browser_specific_settings": {
    "gecko": {
      "id": "cyberchef-ext@def24.com",
      "strict_min_version": "121.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "background": {
    "scripts": [
      "app/background.js"
    ]
  },
  "sidebar_action": {
    "default_panel": "app/sidepanel.html",
    "default_title": "CyberChef",
    "default_icon": {
      "32": "icons/32.png"
    }
  }
}