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AppHangB1 error occurring, uninstalled and re-installed, can't get Firefox to load

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  • 1 has this problem
  • 9 views
  • Last reply by FredMcD

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Firefox stopped working, gives me AppHangB1 when I try to close it. What can I do?

Problem signature:

 Problem Event Name:	AppHangB1
 Application Name:	firefox.exe
 Application Version:	38.0.5.5623
 Application Timestamp:	5563b224
 Hang Signature:	b4ee
 Hang Type:	0
 OS Version:	6.1.7601.2.1.0.256.48
 Locale ID:	1033
 Additional Hang Signature 1:	b4ee5de6a2322745523997a782b35692
 Additional Hang Signature 2:	277e
 Additional Hang Signature 3:	277e19c30fbd5f6bb531ec9e027c37c3
 Additional Hang Signature 4:	b4ee
 Additional Hang Signature 5:	b4ee5de6a2322745523997a782b35692
 Additional Hang Signature 6:	277e
 Additional Hang Signature 7:	277e19c30fbd5f6bb531ec9e027c37c3
Firefox stopped working, gives me AppHangB1 when I try to close it. What can I do? Problem signature: Problem Event Name: AppHangB1 Application Name: firefox.exe Application Version: 38.0.5.5623 Application Timestamp: 5563b224 Hang Signature: b4ee Hang Type: 0 OS Version: 6.1.7601.2.1.0.256.48 Locale ID: 1033 Additional Hang Signature 1: b4ee5de6a2322745523997a782b35692 Additional Hang Signature 2: 277e Additional Hang Signature 3: 277e19c30fbd5f6bb531ec9e027c37c3 Additional Hang Signature 4: b4ee Additional Hang Signature 5: b4ee5de6a2322745523997a782b35692 Additional Hang Signature 6: 277e Additional Hang Signature 7: 277e19c30fbd5f6bb531ec9e027c37c3

All Replies (1)

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What is your computer system and Firefox?

Let’s do a full clean re-install; Download Firefox For All languages And Systems {web link} Save the file. Then Close Firefox.

Using your file browser, open the Programs Folder on your computer.

Windows: C:\Program Files C:\Program Files (x86) Mac: Open the "Applications" folder.
https://support.mozilla.org/en-US/kb/how-download-and-install-firefox-mac Linux: Check your user manual. 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.

Do Not remove the profiles folder.

Look for, and rename any Mozilla or Firefox program folders by adding .old to them. Do not rename the Mozilla Thunderbird folder if there is one.

After rebooting the computer, run a registry scanner. Then run the installer. If all goes well, remove the OLD folders when you are done.


If there is a problem, start your Computer in safe mode and try again.

Starting The Computer In Safe Mode;
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