hi, could you press windows-key+R and open: %localappdata% a windows explorer window should open up - in there delete the folder labelled "Mozilla" and see if you can start firefox normally afterwards.

Thanks for the reply, but the same thing happens.

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?

While still in Safe Mode,

In the address bar, type about:crashes<enter>.

Note: If any reports do not have BP in front of the numbers/letters, click it to submit them.

The crash report is several pages of data. We need the report numbers to see the whole report.

Using your mouse, mark the most resent 7 - 10 crash reports, and copy them. Now go to the reply box and paste them in.

For more help on crash reports, see; https://support.mozilla.org/en-US/kb/firefox-crashes-asking-support +++++++++++++++++++++++ If you can't get Firefox to open, you will have to do this the hard way.

https://support.mozilla.org/en-US/kb/mozillacrashreporter Open the file browser / explorer on your computer. Note: You may have to enable Show Hidden Folders / Files. Enter this in the address bar;

Windows: %APPDATA%\Mozilla\Firefox\Crash Reports\submitted Win 7/Vista: C:\Users\<username>\AppData\Roaming\Mozilla\Firefox\Crash Reports\submitted Win XP/2000: C:\Documents and Settings\<username>\Application Data\Mozilla\Firefox\Crash Reports\submitted

Mac OS: /Users/<username>/Library/Application Support/Firefox/Crash Reports/submitted Linux: /home/<username>/.mozilla/firefox/Crash Reports/submitted

Copy the most recent 5-7 File Names in the folder. Post the information in the reply box.

I cannot start in safe mode either.

crash.main.2 1517605305 a08a9cbf-08b6-4123-b234-fa40eb0815a1 ServerURL=https://crash-reports.mozilla.com/submit?id={ec8030f7-c20a-464f-9b0e-13a3a9e97384}&version=58.0.1&buildid=20180128191252 StartupTime=1517605300 SafeMode=0 ProductName=Firefox Vendor=Mozilla InstallTime=1517595345 CPUMicrocodeVersion=0xb00001f ReleaseChannel=release Version=58.0.1 StartupCrash=1 BuildID=20180128191252 ProductID={ec8030f7-c20a-464f-9b0e-13a3a9e97384} CrashTime=1517605305 UptimeTS=53.75711 SecondsSinceLastCrash=60 BlockedDllList= SystemMemoryUsePercentage=31 TotalVirtualMemory=8796092891136 AvailableVirtualMemory=8794782867456 TotalPageFile=8587096064 AvailablePageFile=7186948096 TotalPhysicalMemory=4294500352 AvailablePhysicalMemory=2950529024 MozCrashReason=MOZ_RELEASE_ASSERT(globalObj) ThreadIdNameMapping=4408:"Gecko_IOThread",844:"Timer",6068:"Link Monitor",312:"Socket Thread",5632:"JS Watchdog",

crash.main.2 1517605245 ec8b061c-d12e-4e98-a32b-613fd54df189 ServerURL=https://crash-reports.mozilla.com/submit?id={ec8030f7-c20a-464f-9b0e-13a3a9e97384}&version=58.0.1&buildid=20180128191252 StartupTime=1517605240 SafeMode=0 ProductName=Firefox Vendor=Mozilla InstallTime=1517595345 CPUMicrocodeVersion=0xb00001f ReleaseChannel=release Version=58.0.1 StartupCrash=1 BuildID=20180128191252 ProductID={ec8030f7-c20a-464f-9b0e-13a3a9e97384} CrashTime=1517605245 UptimeTS=53.74725 SecondsSinceLastCrash=481 BlockedDllList= SystemMemoryUsePercentage=31 TotalVirtualMemory=8796092891136 AvailableVirtualMemory=8794780770304 TotalPageFile=8587096064 AvailablePageFile=7189970944 TotalPhysicalMemory=4294500352 AvailablePhysicalMemory=2956226560 MozCrashReason=MOZ_RELEASE_ASSERT(globalObj) ThreadIdNameMapping=5984:"Gecko_IOThread",3328:"Timer",5680:"Link Monitor",5996:"Socket Thread",5972:"JS Watchdog",

crash.main.2 1517604764 22067f6b-c51b-4b73-83af-d6f361436e46 ServerURL=https://crash-reports.mozilla.com/submit?id={ec8030f7-c20a-464f-9b0e-13a3a9e97384}&version=58.0.1&buildid=20180128191252 StartupTime=1517604759 SafeMode=0 ProductName=Firefox Vendor=Mozilla InstallTime=1517595345 CPUMicrocodeVersion=0xb00001f ReleaseChannel=release Version=58.0.1 StartupCrash=1 BuildID=20180128191252 ProductID={ec8030f7-c20a-464f-9b0e-13a3a9e97384} CrashTime=1517604764 UptimeTS=54.83612 SecondsSinceLastCrash=42 BlockedDllList= SystemMemoryUsePercentage=30 TotalVirtualMemory=8796092891136 AvailableVirtualMemory=8794782867456 TotalPageFile=8587096064 AvailablePageFile=7221772288 TotalPhysicalMemory=4294500352 AvailablePhysicalMemory=2981363712 MozCrashReason=MOZ_RELEASE_ASSERT(globalObj) ThreadIdNameMapping=5688:"Gecko_IOThread",4224:"Timer",5620:"Link Monitor",5672:"Socket Thread",5692:"JS Watchdog",

crash.main.2 1517604722 77c91178-68dd-491c-9163-964dfe17fdd3 ServerURL=https://crash-reports.mozilla.com/submit?id={ec8030f7-c20a-464f-9b0e-13a3a9e97384}&version=58.0.1&buildid=20180128191252 StartupTime=1517604716 SafeMode=0 ProductName=Firefox Vendor=Mozilla InstallTime=1517595345 CPUMicrocodeVersion=0xb00001f ReleaseChannel=release Version=58.0.1 StartupCrash=1 BuildID=20180128191252 ProductID={ec8030f7-c20a-464f-9b0e-13a3a9e97384} CrashTime=1517604722 UptimeTS=59.20897 SecondsSinceLastCrash=2203 BlockedDllList= SystemMemoryUsePercentage=30 TotalVirtualMemory=8796092891136 AvailableVirtualMemory=8794782867456 TotalPageFile=8587096064 AvailablePageFile=7256162304 TotalPhysicalMemory=4294500352 AvailablePhysicalMemory=3002994688 MozCrashReason=MOZ_RELEASE_ASSERT(globalObj) ThreadIdNameMapping=5324:"Gecko_IOThread",5308:"Timer",3960:"Link Monitor",5300:"Socket Thread",236:"JS Watchdog",

crash.main.2 1517602519 cbd33fbb-1cb5-493c-b9ea-6f717a2ff2be ServerURL=https://crash-reports.mozilla.com/submit?id={ec8030f7-c20a-464f-9b0e-13a3a9e97384}&version=58.0.1&buildid=20180128191252 StartupTime=1517602514 SafeMode=0 ProductName=Firefox Vendor=Mozilla InstallTime=1517595345 CPUMicrocodeVersion=0xb00001f ReleaseChannel=release Version=58.0.1 StartupCrash=1 BuildID=20180128191252 ProductID={ec8030f7-c20a-464f-9b0e-13a3a9e97384} CrashTime=1517602519 UptimeTS=58.43503 SecondsSinceLastCrash=103 BlockedDllList= SystemMemoryUsePercentage=31 TotalVirtualMemory=8796092891136 AvailableVirtualMemory=8794782867456 TotalPageFile=8587096064 AvailablePageFile=7119040512 TotalPhysicalMemory=4294500352 AvailablePhysicalMemory=2933788672 MozCrashReason=MOZ_RELEASE_ASSERT(globalObj) ThreadIdNameMapping=5692:"Gecko_IOThread",5696:"Timer",5700:"Link Monitor",5704:"Socket Thread",5708:"JS Watchdog",

crash.main.2 1517602416 e6ae1370-e2ef-498e-8a65-cf33c8d2ee15 ServerURL=https://crash-reports.mozilla.com/submit?id={ec8030f7-c20a-464f-9b0e-13a3a9e97384}&version=58.0.1&buildid=20180128191252 StartupTime=1517602410 SafeMode=0 ProductName=Firefox Vendor=Mozilla InstallTime=1517595345 CPUMicrocodeVersion=0xb00001f ReleaseChannel=release Version=58.0.1 StartupCrash=1 BuildID=20180128191252 ProductID={ec8030f7-c20a-464f-9b0e-13a3a9e97384} CrashTime=1517602416 UptimeTS=54.055789999 SecondsSinceLastCrash=1270 BlockedDllList= SystemMemoryUsePercentage=31 TotalVirtualMemory=8796092891136 AvailableVirtualMemory=8794782867456 TotalPageFile=8587096064 AvailablePageFile=7194509312 TotalPhysicalMemory=4294500352 AvailablePhysicalMemory=2944278528 MozCrashReason=MOZ_RELEASE_ASSERT(globalObj) ThreadIdNameMapping=896:"Gecko_IOThread",4088:"Timer",3216:"Link Monitor",5968:"Socket Thread",3472:"JS Watchdog",

FredMcD said

If you can't get Firefox to open, you will have to do this the hard way.

What's the hard way?

If you can't get Firefox to open, you will have to do this the hard way.

https://support.mozilla.org/en-US/kb/mozillacrashreporter Open the file browser / explorer on your computer. Note: You may have to enable Show Hidden Folders / Files. Enter this in the address bar;

Windows: %APPDATA%\Mozilla\Firefox\Crash Reports\submitted Win 7/Vista: C:\Users\<username>\AppData\Roaming\Mozilla\Firefox\Crash Reports\submitted Win XP/2000: C:\Documents and Settings\<username>\Application Data\Mozilla\Firefox\Crash Reports\submitted

Mac OS: /Users/<username>/Library/Application Support/Firefox/Crash Reports/submitted Linux: /home/<username>/.mozilla/firefox/Crash Reports/submitted

Copy the most recent 5-7 File Names in the folder. Post the information in the reply box.