Catch errors raised when looking up the default browser (#1187)
Catch errors raised when looking up the default browser (#1187)


yebrahim/datalab,yebrahim/datalab,craigcitro/datalab,googledatalab/datalab,yebrahim/datalab,yebrahim/datalab,googledatalab/datalab,yebrahim/datalab,googledatalab/datalab,parthea/datalab,googledatalab/datalab,parthea/datalab,parthea/datalab,craigcitro/datalab,craigcitro/datalab,craigcitro/datalab,parthea/datalab,googledatalab/datalab,parthea/datalab,parthea/datalab,googledatalab/datalab,craigcitro/datalab