webpreferences

A string which is a comma separated list of strings which specifies the web preferences to be set on the webview. The full list of supported preference strings can be found in BrowserWindow.

The string follows the same format as the features string in window.open. A name by itself is given a true boolean value. A preference can be set to another value by including an =, followed by the value. Special values yes and 1 are interpreted as true, while no and 0 are interpreted as false.