I've tried everything I can think of. Clicking on Firefox ALWAYS results in the "We're Sorry" window, safe mode or not. I have tried uninstall/reinstall, install older version, copy old profile to latest folder, free up lots of memory space, several runs of purging the registry, many other fixes, nothing makes any difference. The instructions for getting a report ID when Firefox won't open DON'T WORK. All I can do is send the results listed in the "Details" box: AbortMessage: ###!!! ABORT: new XPCJSContext failed to initialize.: file c:/builds/moz2_slave/m-esr52-w32-000000000000000000/build/src/js/xpconnect/src/XPCJSContext.cpp, line 3474 AvailablePageFile: 8503926784 AvailablePhysicalMemory: 2801811456 AvailableVirtualMemory: 1862664192 BlockedDllList: BreakpadReserveAddress: 441712640 BreakpadReserveSize: 67108864 BuildID: 20171005074949 CPUMicrocodeVersion: 0xb3 CrashTime: 1509244417 InstallTime: 1509221461 MozCrashReason: MOZ_CRASH() Notes: xpcom_runtime_abort(###!!! ABORT: new XPCJSContext failed to initialize.: file c:/builds/moz2_slave/m-esr52-w32-000000000000000000/build/src/js/xpconnect/src/XPCJSContext.cpp, line 3474) ProductID: {ec8030f7-c20a-464f-9b0e-13a3a9e97384} ProductName: Firefox ReleaseChannel: esr SafeMode: 0 SecondsSinceLastCrash: 1167 StartupCrash: 1 StartupTime: 1509244416 SystemMemoryUsePercentage: 25 Throttleable: 1 TotalPageFile: 9218506752 TotalPhysicalMemory: 3756056576 TotalVirtualMemory: 2147352576 URL: UptimeTS: 24.215621 User32BeforeBlocklist: 1 Vendor: Mozilla Version: 52.4.1