The crash report shows memory usage is a bit high, but okay for now. It did not show the cause of the crash.

How are you shutting down Firefox? Any other issues?

Start Firefox in Safe Mode {web Link} by holding down the <Shift>
(Mac Options) key, and then starting Firefox. Is the problem still there?

I have tried safe mode as well, it doesn't help. I have noted one thing by observation over long period of time that whenever I log in to gmail/open gmail in my firefox session, and then when I close firefox session by just pressing red cross(that's how i close it), crash always happens. Other time it rarely happens.

Memory should not be issue, there's plenty of free space! I have this problem for so long now  :(

Report says Crash Reason: EXCEPTION_ACCESS_VIOLATION_READ

We need to see the crash report numbers. The reports cover several pages.

xaptar said

whenever I log in to gmail/open gmail in my firefox session, and then when I close Firefox session by just pressing red cross(that's how i close it), crash always happens. Other time it rarely happens.

Please try this. Follow the directions to remove Gmail. The next time you go back, the data will be re-uploaded.

Remove History For One Site Open the History Manager <Control><Shift> H. In the search bar, enter the name of the site. Right click on one of the listings and select Forget About This Site. This should remove all information, including any passwords / settings.

I'm not sure what you mean by crash report numbers. I did gmail history clearing thing, didn't help. Actually now it's happening every time I close firefox session, maybe not only when simple google.com & no search.

Latest reports are : bp-188b1aab-0795-467f-9e67-cfa9c2150414

bp-8cc1e366-bc3a-4434-92aa-3dd742150414

Crash thread in report mentions "xul.dll", is it because of it?

I just uninstalled firefox, re-install it. Open firefox, google.com homepage opened. I did nothing & just exit the session & Crash reporter appeared.

bp-6ba5ac09-0c79-4e23-990a-68f062150414

[just sharing info that might be helpful in solving this issue]

Do a malware check with several malware scanning programs on the Windows computer. Please scan with all programs because each program detects different malware. All these programs have free versions.

Make sure that you update each program to get the latest version of their databases before doing a scan.

• Malwarebytes' Anti-Malware:
  http://www.malwarebytes.org/mbam.php
• AdwCleaner:
  http://www.bleepingcomputer.com/download/adwcleaner/
  http://www.softpedia.com/get/Antivirus/Removal-Tools/AdwCleaner.shtml
• SuperAntispyware:
  http://www.superantispyware.com/
• Microsoft Safety Scanner:
  http://www.microsoft.com/security/scanner/en-us/default.aspx
• Windows Defender:
  http://windows.microsoft.com/en-us/windows/using-defender
• Spybot Search & Destroy:
  http://www.safer-networking.org/en/index.html
• Kasperky Free Security Scan:
  http://www.kaspersky.com/security-scan

You can also do a check for a rootkit infection with TDSSKiller.

• Anti-rootkit utility TDSSKiller:
  http://support.kaspersky.com/5350?el=88446

See also:

• "Spyware on Windows": http://kb.mozillazine.org/Popups_not_blocked
• https://support.mozilla.org/kb/troubleshoot-firefox-issues-caused-malware

xaptar said

I'm not sure what you mean by crash report numbers

These are the crash report numbers:

bp-188b1aab-0795-467f-9e67-cfa9c2150414

bp-8cc1e366-bc3a-4434-92aa-3dd742150414

The crash reports flagged this;

mozilla::MediaCacheStream::Close()

(BTW, xul.dll = Firefox)

You tried Firefox in Safe Mode and the crash still happen.

Start your Computer in safe mode with networking. Then start Firefox. Try Safe web sites. Is the problem still there?

Starting The Computer In Safe Mode;
Free Online Encyclopedia

@cor-el: I did mal-ware check & just used top 3 programs & after that it seems the problem has gone. No crash so far :) Thank you very much!

@FredMcD: Thanks for your help as well!

I'm having the same problem. Every time I exit Firefox, it seemingly closes (the window disappears) but the firefox.exe process starts eating up memory very-very rapidly (100 MB/s) until it cannot allocate any more memory and then crashes. I have doubts as to whether the cause is a malware.

David

As for my problem, it was caused by the Virtru 3.4.0 add-on. Even trying to disable it caused a memory leakage crash. I disabled it in safe mode and now Firefox closes normally. HTH.

D.

mrnagydavid said

I'm having the same problem. Every time I exit Firefox, it seemingly closes (the window disappears) but the firefox.exe process starts eating up memory very-very rapidly (100 MB/s) until it cannot allocate any more memory and then crashes. I have doubts as to whether the cause is a malware. David