Examine source code of Custom Window Resizer

{
  "manifest_version": 3,
  "name": "Window Resizer",
  "description": "Resize the browser window.",
  "version": "3.0",
  "icons": {
    "16": "icons/icon-16.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "options_page": "options.html",
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "action": {
    "default_icon": "icons/icon-128.png",
    "default_popup": "popup.html",
    "default_title": "Window Resizer"
  },
  "permissions": [
    "storage",
    "tabs",
    "scripting"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "commands": {
    "tab_explosion": {
      "suggested_key": {
        "default": "Ctrl+Shift+E"
      }
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "window-resizer@genxjay.com",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  }
}