setCurrentToDefault method
Removes any applied value from the current User Agent string, and resets it to the default for the page.
Note These APIs can only be used with F12 developer tools and the Diagnostics Script Engine, and can't be called from JavaScript.
Syntax
DiagnosticsUserAgentStringManager.setCurrentToDefault();
Parameters
This method has no parameters.
Return value
This method does not return a value.