I upgraded the firefox from 3.6.8 to 10.0.5 using yum on my Centos 6 machine.Now each time I start firefox, there is always an error message saying that " firefox: xcb_io.c:542: _... [by pengyou54]
on 06/15/2012 – Made popular on 06/15/2012
Upgraded Firefox due to today's security announcement.
Closed Firefox and restarted but after about 20 seconds, Firefox stopped
trying to start. No error messages displayed.
Firefox would not start in safe mode.