Product Firefox Release Channel release Version 54.0.1 Build ID 20170628075643 OS Windows 10 OS Version 10.0.10586 bp-f18af091-2949-49e3-b1d2-a18a81170709 Signature: Microsoft::WRL::ComPtr<T>::As<T> This is for Sumo's Related Bugs 1354668 NEW --- Crash in Microsoft::WRL::ComPtr<T>::As<T> ----------------- This is a new type crash. Perform a System File Check to fix corrupted system files '''Win 7, 8, 10, Vista:''' https://support.microsoft.com/en-us/kb/929833 '''Win XP:''' https://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/system_file_checker.mspx?mfr=true Wiki - Windows 10 System File Check http://answers.microsoft.com/en-us/windows/wiki/windows_10-update/system-file-check-sfc-scan-and-repair-system-files/bc609315-da1f-4775-812c-695b60477a93 ------------------ [https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-mode Start Firefox in Safe Mode] {web link} by holding down the '''<Shift> ''(Mac=Options)''''' key, and then starting Firefox. A small dialog should appear. Click '''Start In Safe Mode''' (not Refresh). Is the problem still there?

Locking this thread as duplicate. Please continue at: https://support.mozilla.org/questions/1172484