Product Firefox Release Channel release Version 63.0.1 Build ID 20181030165643 OS Windows 7 OS Version 6.1.7601 Service Pack 1

bp-0a38ead4-bcaa-42a2-9b5b-3f3de0181103 Signature: vcruntime140.dll@0xcacf | sftk_NewAttribute

VCRUNTIME140.dll = Microsoft Visual C++

This is for Sumo's Related Bugs 1501643 RESOLVED DUPLICATE Crash in vcruntime140.dll@0xcacf | sftk_NewAttribute

See if running the Windows Updater helps.

hi, similar as in https://support.mozilla.org/en-US/questions/1238391 it appears to be a problem related to the old amd cpu on the affected system.

a workaround might be to switch to the 32-bit version of firefox: https://www.mozilla.org/firefox/all/