GeckoFx Alert Supression

'Source: https://stackoverflow.com/questions/48092059/disable-alert-boxes-when-site-not-found-gecko-fx-vb

'Create a new class called NoPromptService with code:

Imports Gecko

Public Class NoPromptService
    Inherits PromptService

    Public Overrides Sub Alert(ByVal dialogTitle As String, ByVal text As String)
        Debug.WriteLine(text)'Instead of the alert dialog, it will print it out.
    End Sub
End Class

'On Form_Load add code:
        PromptFactory.PromptServiceCreator = Function() New NoPromptService