A / massive / devaluation there for the maturity of the user interface with the firmware / Fritz! OS 6:03 (status 05/2014). Both in Firefox 29 and Internet Exporer 11 gives every third click a misrepresentation, gross blunder in the user interface or not rare times a Lua error message (Lua is a programming language used by the device). That's about as if the 50 Euro / 4-course menu in a restaurant broken glass - a no-go in 2014th