Output on console: Sandbox: seccomp sandbox violation: pid 5280, tid 5280, syscall 17, args 17 140730934213152 560 7081708 140730934213152 7081708. ###!!! [Parent][MessageChannel::Call] Error: Channel error: cannot send/recv JavaScript error: , line 0: NS_ERROR_FAILURE: NS_ERROR_FAILURE (0x80004005) - GMPService::operator() failed since GetContentParent rejects the promise with reason NS_ERROR_FAILURE (0x80004005) - GeckoMediaPluginServiceChild::GetContentParent SendLaunchGMPForNodeId failed with description (Process has not loaded.). Message in system journal: Feb 23 21:33:37 capella kernel: MainThread[5280]: segfault at 0 ip 00007feda3abac9b sp 00007ffe7957c508 error 6 in libxul.so[7feda263e000+39ff000] Feb 23 21:33:37 capella kernel: Code: 00 00 00 00 00 00 00 0f 0b 4c 8d 05 77 03 ac 02 4c 89 00 c7 04 25 00 00 00 00 00 00 00 00 0f 0b 48 8d 3d 90 03 ac 02 48 89 38 <c7> 04 25 00 00 00 00 00 00 00 00 0f 0b 48 8d 35 b1 03 ac 02 48 89