Product Firefox Release Channel release Version 57.0 Build ID 20171112125346 OS Windows 7 OS Version 6.1.7601 Service Pack 1 bp-e291defc-ce23-4c2b-8612-d08711171202 Signature: mozilla::ipc::MessageChannel::CommonThreadOpenInit mcsc_jvecnjjo.dll = No results found shim_bpppekxb.dll = No results found mcapp_ojoqejke.dll = No results found EpMPApi.dll = McAfee Endpoint This is for Sumo's Related Bugs 1389759 REOPENED --- Crash in mozilla::ipc::MessageChannel:: CommonThreadOpenInit ----------------- Check McAfee for updates. You may have ad/mal-ware. Further information can be found in this article; https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-caused-malware?cache=no Run most or all of the listed malware scanners. Each works differently. If one program misses something, another may pick it up.