addCustom method
Adds a custom user agent (UA) string with a category of "Custom" into the collection of UA strings.
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.addCustom(sName, value);
Parameters
sName [in]
Type: DOMStringFriendly name for UA string.
value [in]
Type: DOMStringActual value for UA string.
Return value
This method does not return a value.