Hello there!

Certain Firefox problems can be solved by performing a Clean reinstall. This means you remove Firefox program files and then reinstall Firefox. Please follow these steps:

Note: You might want to print these steps or view them in another browser.

1. Download the latest Desktop version of Firefox from http://www.mozilla.org and save the setup file to your computer.
2. After the download finishes, close all Firefox windows (click Exit from the Firefox or File menu).
3. Delete the Firefox installation folder, which is located in one of these locations, by default:
   • Windows:
     • C:\Program Files\Mozilla Firefox
     • C:\Program Files (x86)\Mozilla Firefox
   • Mac: Delete Firefox from the Applications folder.
   • Linux: If you installed Firefox with the distro-based package manager, you should use the same way to uninstall it - see Install Firefox on Linux. If you downloaded and installed the binary package from the Firefox download page, simply remove the folder firefox in your home directory.
4. Now, go ahead and reinstall Firefox:
   1. Double-click the downloaded installation file and go through the steps of the installation wizard.
   2. Once the wizard is finished, choose to directly open Firefox after clicking the Finish button.

More information about reinstalling Firefox can be found here.

WARNING: Do not run Firefox's uninstaller or use a third party remover as part of this process, because that could permanently delete your Firefox data, including but not limited to, extensions, cache, cookies, bookmarks, personal settings and saved passwords. These cannot be easily recovered unless they have been backed up to an external device!

Please report back to say if this helped you!

Thank you.

Did you mean that other browsers are also crashing?

Sometimes a problem with Firefox may be a result of malware installed on your computer, that you may not be aware of.

You can try these free programs to scan for malware, which work with your existing antivirus software:

• Microsoft Safety Scanner
• MalwareBytes' Anti-Malware
• TDSSKiller - AntiRootkit Utility
• Hitman Pro
• ESET Online Scanner

Microsoft Security Essentials is a good permanent antivirus for Windows 7/Vista/XP if you don't already have one.

Further information can be found in the Troubleshoot Firefox issues caused by malware article.

Did this fix your problems? Please report back to us!

From crash report 9ac0f21a-1e9c-4af2-8371-804072140630

Total Virtual Memory 4294836224

Available Virtual Memory 3584331776

System Memory Use Percentage 76

Available Page File 2899906560

Available Physical Memory 998088704

Related Bugs

https://bugzilla.mozilla.org/show_bug.cgi?id=740315 RESOLVED DUPLICATE crash in nsHttpPipeline::ReadFromPipe @ nsSocketOutputStream::Write

https://bugzilla.mozilla.org/show_bug.cgi?id=671468 NEW --- Firefox crash @ nsSocketOutputStream::Write(char const*, unsigned int, unsigned int*) (Correlation to Спутник @Mail.Ru and Yandex.Bar)

bp-0b1cb3a3-03b0-4531-a103-e198b2140630

https://bugzilla.mozilla.org/show_bug.cgi?id=842788 NEW --- crash in nsDiskCacheStreamIO::Write