I just downloaded and installed version 4.0b4pre and it is very very nice no crashes (yet?) and everything seems ok so far, but this is a nightly build so maybe I am just lucky this time, who knows? Anyway: Ok I see this would be a kludge to expect printing from the app, especially for Fennec which has this beautiful save as pdf feature builtin. So ok, just save as pdf and use the normal gtklp routine for printing (It does have the usual print dialogue available for web-sites that provide the print button, but I still have not hacked that dialogue into working yet) The tabbing is nice once you get accustomed to how it works, and the overall feel is silky.