Start Firefox in Safe Mode {web Link} by holding down the <Shift>
(Mac Options) key, and then starting Firefox. 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 and select Submit.

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 below and paste them in.

Unfortunately, I can't even open it in Safe Mode. I held the Shift key down, clicked on the Firefox icon, and I instantly get the Mozilla Crash Reporter screen.

hi, looking at your crash report at https://crash-stats.mozilla.com/report/index/1d031a5f-029e-44ab-8d2a-8aed52151018 it appears that this startup crash caused by external software on the computer. please go into your system's control panel and remove any software labelled "Freecorder" or similar or by the publisher "Applian Technologies" or any other toolbars.

I removed them, but still the same problem. Here is the most recent report from the crash:

AvailablePageFile: 14448701440 AvailablePhysicalMemory: 6159253504 AvailableVirtualMemory: 4140503040 BlockedDllList: BlocklistInitFailed: 1 BreakpadReserveAddress: 336920576 BreakpadReserveSize: 67108864 BuildID: 20151014143721 CrashTime: 1445182757 InstallTime: 1445135376 ProductID: {ec8030f7-c20a-464f-9b0e-13a3a9e97384} ProductName: Firefox ReleaseChannel: release SafeMode: 0 SecondsSinceLastCrash: 5977 StartupTime: 1445182756 SystemMemoryUsePercentage: 26 Throttleable: 1 TotalPageFile: 16840388608 TotalPhysicalMemory: 8421134336 TotalVirtualMemory: 4294836224 URL: User32BeforeBlocklist: 1 Vendor: Mozilla Version: 41.0.2

This report also contains technical information about the state of the application when it crashed.

could you also try step 2 (Prevent auto-startup) from jscher2000's reply at https://support.mozilla.org/en-US/que.../1088693#answer-794082 ?

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 last 5-7 Recent File Names in the folder. Post the information in the reply box below.

Crash ID: bp-0af48855-668b-4c32-95fe-1a1222150927 Crash ID: bp-0f12f58c-56d3-4cc1-940b-f72372150929 Crash ID: bp-1d031a5f-029e-44ab-8d2a-8aed52151018 Crash ID: bp-5ba8a211-dafd-40aa-b10e-5ccd22151005 Crash ID: bp-5fc08dcb-255f-43c4-b329-423c32151005 Crash ID: bp-6af16449-e046-4c74-a776-5a69d2151005 Crash ID: bp-8b41cd05-3162-4f76-ac6f-435952151018

Product Firefox Version 41.0.2

Release Channel release OS Windows NT OS Version 6.1.7601 Service Pack 1

The crash report flagged these programs;

bp-1d031a5f-029e-44ab-8d2a-8aed52151018

Kernel32.dll = Microsoft

ntdll.dll = Microsoft

IPSEng32.dll = Symantec Intrusion Detection

Related Bugs 1205987 REOPENED --- startup crash in PR_Read | GetStatusFileContents<T> with freecorder app ++++++++++++++++++++++++++++++++++++++++++++ bp-0f12f58c-56d3-4cc1-940b-f72372150929

FLVSrvLib.dll = Applian Technologies = Freecorder

NlsLexicons0009 = Microsoft® Windows

IPSEng32.dll = Symantec Intrusion Detection

icudt52.dll = International Components for Unicode ++++++++++++++++++++++++++++++++++++++++++++++++++ bp-0af48855-668b-4c32-95fe-1a1222150927

msmpeg2vdec.dll = Microsoft DTV-DVD Video Decoder

IPSEng32.dll = Symantec Intrusion Detection

Remove Freecorder from your system

Perform a System File Check to fix corrupted system files Win 7, 8, 10, Vista: https://support.microsoft.com/en-us/kb/929833

See if there are updates for your graphics drivers https://support.mozilla.org/kb/upgrade-graphics-drivers-use-hardware-acceleration