Examine source code of Cookie Transfer

{
  "manifest_version": 3,
  "name": "Cookie Transfer",
  "short_name": "Cookies",
  "version": "1.0.0",
  "description": "Copy cookies from one site to the active tab's domain with a click or keyboard shortcut.",
  "author": "pk-kher",
  "homepage_url": "https://github.com/pk-kher/extension",
  "permissions": [
    "cookies",
    "activeTab",
    "tabs",
    "storage"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "action": {
    "default_title": "Copy Cookies",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "commands": {
    "_execute_action": {
      "suggested_key": {
        "default": "Alt+Shift+C",
        "mac": "Alt+Shift+C"
      },
      "description": "Copy cookies to active tab"
    }
  },
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "type": "module"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "cookie-transfer@extension",
      "strict_min_version": "128.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}