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

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) and confirm all upcoming messages.
3. Now, uninstall Firefox by following the steps mentioned in the Uninstall Firefox article.

IMPORTANT: On Windows, the uninstaller has the option to remove your personal data and settings. Make sure that you do not check this option; otherwise all of your bookmarks, passwords, extensions, user customizations and other Firefox user profile data will be removed from your computer.

After uninstalling Firefox on Windows, delete the "Mozilla Firefox" program folder, located by default in one of these locations:

• (On 32-bit Windows) C:\Program Files\Mozilla Firefox
• (On 64-bit Windows) C:\Program Files (x86)\Mozilla Firefox

1. Go to the Windows Start menu and click on "Computer".
2. In the Explorer window that opens, double click Local Disk (C:) to open the C:\ drive.
3. Find the "Program Files (x86)" folder or "Program Files" folder.
   • On 32-bit Windows, double-click the Program Files folder to open it.
   • On 64-bit Windows, you will see a "Program Files (x86)" folder AND a "Program Files" folder. Open the Program Files (x86) folder.
4. Look for a Mozilla Firefox folder. If you find one, right-click it and select Delete and confirm that you want to move the folder to the Recycle Bin.

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.

Please report back to see if this helped you!

I have done that but it does not work.

We're sorry to hear that your Firefox seems to be crashing when you open it. Please perform the following steps to give us a crash report ID that helps us find out more about the cause of the crash.

1. Press the following shortcut to get a Run window: [Windows] + [R]. This should bring up a window that contains a text field.
2. In that text field, enter %APPDATA% and press Enter. An explorer window should open.
3. From that explorer window, double-click on the Mozilla folder, then double-click on Firefox and then on Crash reports. Double-click on submitted.
4. Now, you should see a list of files that contain reports. Go to View > Arrange Icons by > Modified to get the most recent files at the top of the window.
5. Open the most recent 5 files with a text editor and copy the IDs.
6. Paste each ID into the reply window on the forums.

Thanks in advance!

You can find more information and troubleshooting steps in the Troubleshoot Firefox crashes (closing or quitting unexpectedly) article.

Also, try following the steps at Troubleshoot Firefox issues caused by malware

Do a malware check with some malware scanning programs on the Windows computer.
You need to scan with all programs because each program detects different malware.
Make sure that you update each program to get the latest version of their databases before doing a scan.

• http://www.malwarebytes.org/mbam.php - Malwarebytes' Anti-Malware
• http://www.superantispyware.com/ - SuperAntispyware
• http://www.microsoft.com/security/scanner/en-us/default.aspx - Microsoft Safety Scanner
• http://www.microsoft.com/windows/products/winfamily/defender/default.mspx - Windows Defender: Home Page
• http://www.safer-networking.org/en/index.html - Spybot Search & Destroy

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

• http://support.kaspersky.com/viruses/solutions?qid=208280684

See also:

• "Spyware on Windows": http://kb.mozillazine.org/Popups_not_blocked

bp-9f0c29eb-432c-448a-a00a-ec3832130112

bp-dd9969ad-a700-492b-8a57-4d9be2130112

bp-0ea29d8f-5d09-42db-9137-52a742130111

bp-71f7b39f-62f9-4b8b-9314-950ad2130111

Did you try all above mentioned malware scanners?

The involved file in your case is lpmejxvg.dll as you can see in the modules list of the crash report.

• https://crash-stats.mozilla.com/report/index/9f0c29eb-432c-448a-a00a-ec3832130112

Try to boot the computer in Windows Safe mode with network support (press F8 on the boot screen) to see if that allows to locate and remove the file either manually or with a malware scanner.

You can also try to scan the Windows registry for that file (Ctrl+F).

Thank you! That does seem to fix the firefox issue but how do you prevent the computer to stop saying "There was a problem starting lpmejxvg.dll. The specified module could not be found" from popping up everytime the computer is booted?

Did you do a registry search to be sure to remove other keys that point to that file?

You can also try a registry cleaner like CCleaner.

What was the location of the lpmejxvg.dll file?

Click start, search for msconfig, press Enter. Go to startup. Find the file, uncheck it, then restart your PC.

Crash ID: bp-623d1cca-3915-4252-9363-5832d2130225 Crash ID: bp-b71ff724-9bfe-452f-b394-ca80c2130225 Crash ID: bp-991bfc71-6798-4388-af33-646f92130225 Crash ID: bp-d5fde7de-349b-445c-b042-6dbfc2130225 Crash ID: bp-8f43b7c8-fa22-4104-8abf-c21ae2130225

Hi pnother

There is a problem on Windows 8 with Firefox 19 and AMD Radeon HD 6XXX/7XXX graphic display cards.

This issue is currently being investigated in bug 830531.

• bug 830531 - [Win8] crash in XPC_WN_Helper_NewResolve mainly with AMD Radeon HD 6290/6310/6320/7290/7310/7340

(please do not comment in bug reports: https://bugzilla.mozilla.org/page.cgi?id=etiquette.html)

If you have one of those display cards then best is to stay with or downgrade to Firefox 18.0.2 for now or try the Firefox 20 beta version that doesn't seem to be affected.

• https://ftp.mozilla.org/pub/mozilla.org/firefox/releases/18.0.2/win32/en-US/
• http://www.mozilla.org/en-US/firefox/beta/

i've been having the same problem where i will try and start firefox only to have it give a crash report without opening a webpage. i've tried a clean install & running ccleaner & spybot. it'll work when i run it in firefox safe mode but no extensions are enabled. Crash ID: bp-e2b3c1d2-6b67-4bc2-8c28-96c1b2130302 Crash ID: bp-6ccfb801-2efd-4960-af4f-043fa2130302 thanks for any help you can give

i 'downgraded' to firefox 18 and that solved the problem...

pnother

Did not see your Crash IDs, but presume you are on Windows 8 and that it relates to bug 812683 . An alternative and possibly better solution would be to upgrade to Firefox Beta 20, instead of downgrading to fx18.

• http://www.mozilla.org/en-US/firefox/channel/#beta/beta-desktop
• Note, no need to uninstall Firefox, and please do NOT use any option to delete personal information.

You would have been better posting in your own thread, because his one is solved, and the original thread owner's crash related to a malware problem.

I will close this thread, because the original question is solved.

CJC3

Your crash relates to

• Firefox 19.0 Crash Report [@ CResource<ID3D11Resource>::InvalidAlignment(D3D11_BOX const*) ]
• bug Bug 819028 - crash in gfxWindowsPlatform::UpdateRenderMode @ CResource::InvalidAlignment (D3D11 from IE10 preview for Win7)

Possibly backing out recent MS updates, or video driver changes may help.

Please start your own thread using /questions/new