Hello,

Could you try a few things.

1) Try to start in safe mode to do so: Try Firefox Safe Mode to see if the problem goes away. Firefox Safe Mode is a troubleshooting mode that temporarily turns off hardware acceleration, resets some settings, and disables add-ons (extensions and themes).

If Firefox is open, you can restart in Firefox Safe Mode from the Help menu:

• Click the menu button , click Help and select Restart with Add-ons Disabled.

If Firefox is not running, you can start Firefox in Safe Mode as follows:

• On Windows: Hold the Shift key when you open the Firefox desktop or Start menu shortcut.
• On Mac: Hold the option key while starting Firefox.
• On Linux: Quit Firefox, go to your Terminal and run firefox -safe-mode
  (you may need to specify the Firefox installation path e.g. /usr/lib/firefox)

When the Firefox Safe Mode window appears, select "Start in Safe Mode".

If the issue is not present in Firefox Safe Mode, your problem is probably caused by an extension, theme, or hardware acceleration. Please follow the steps in the Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems article to find the cause.

To exit Firefox Safe Mode, just close Firefox and wait a few seconds before opening Firefox for normal use again.

When you figure out what's causing your issues, please let us know. It might help others with the same problem.

2) If That does not work i would say to do a clean install:

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 mozilla.org (or choose the download for your operating system and language from this page) and save the setup file to your computer.
2. After the download finishes, close all Firefox windows (or open the Firefox menu and click the close button ).
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 use a third party uninstaller as part of this process. Doing so could permanently delete your Firefox profile 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! See Back up and restore information in Firefox profiles.

Please report back to say if this helped you!

Thank you.

Thanks for the reply.

As instructed, 1. Attempted starting in safe mode. It still crashes. 2. Attempting reinstalling as instructed. It still crashes.

Hey,

ShaQ.Blogs said

Thanks for the reply. As instructed, 1. Attempted starting in safe mode. It still crashes. 2. Attempting reinstalling as instructed. It still crashes.

Did you follow the steps for the clean install exactly, and remove the folders as well? Not just reinstall but completely remove firefox from your PC then reinstall

Sir.Mayo said

Did you follow the steps for the clean install exactly, and remove the folders as well? Not just reinstall but completely remove firefox from your PC then reinstall

I deleted the firefox folder from program files folder.

Hey, When you did the clean install did you re-download any Themes,Extensions, or add ons?

Nope. I am using Sync by the way. Not sure if that matters.

I tried creating a new profile, and it did not crash. But that does not help, cos my entire sync is gone for a toss.

Does this happen when you open a new tab using a link, or when you press the new tab button.

What is your about:newtab setting?

The crash report flagged these programs;

avcuf32.dll = BitDefender

igd10umd32.dll = Intel(R) Graphics Technology

icudt52.dll = International Components for Unicode

Download the full installers for the above.

If there is still a problem, disable BitDefender, then check.

Hey,

IF what FredMcD Posted does not work could you try a clean install with out Sync and see if that works

FredMcD said

The crash report flagged these programs; avcuf32.dll = BitDefender igd10umd32.dll = Intel(R) Graphics Technology icudt52.dll = International Components for Unicode

---

Download the full installers for the above.

If there is still a problem, disable BitDefender, then check.

Thanks. Bitdefender was the issue. I uninstalled Bitdefender, restarted PC and problem was gone. I have now reinstalled BitDefender and it is working fine now.

Should I expect this problem to come back? Reinstalling every now and then is a ridiculous solution.

ShaQ.Blogs said

Bitdefender was the issue. Should I expect this problem to come back?

Contact Bitdefender support, and tell them what is going on.

Hello,

I am glad to hear that your problem has been resolved. If you haven't already, please select the answer that solves the problem. This will help other users with similar problems find the solution more easily.

Thank you for contacting Mozilla Support.

FredMcD said

Does this happen when you open a new tab using a link, or when you press the new tab button. What is your about:newtab setting?

Coming back to this. The crash is back.

I edited the newTab config and modified to - about:blank. It does not crash. So crash occurs when the browser.newtab.url config is about:newtab.

I want the new tab page, it shows the pages that I visit regularly!

Can you post the IDs of recent crash report?

If you have submitted crash reports then please post the IDs of one or more recent crash reports that have a "bp-" prefix:

• bp-xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx

You can find the Report ID of recent crash reports on the "Help > Troubleshooting Information" page (about:support).

• Click the "All Crash Reports" button on this page to open the about:crashes page and see all crash reports.

If necessary then you can open about: pages via the location/address bar. If the "bp-" prefix is missing then click its line on the about:crashes page to submit the crash report and the crash report will get a "bp-" prefix (do not add it yourself).

See:

• http://kb.mozillazine.org/Mozilla_Crash_Reporter
• https://support.mozilla.org/kb/Mozilla+Crash+Reporter

Did you Contact Bitdefender?

When you enter about:newtab manually, does it still crash?

Please post the new crash reports.

Manually entering about:newtab crashes. Created a thread on bitdefender forum.

Here is a list of recent crashes. bp-b2a5a566-9f35-4d02-8393-f6a762150415 15-Apr-15 6:45 PM bp-53823313-d330-4c07-81cc-5ff022150415 15-Apr-15 6:41 PM bp-1aaa8465-c929-49a3-85c1-d24b22150415 15-Apr-15 6:36 PM bp-b09780ac-c969-4cf7-afed-699122150414 15-Apr-15 12:41 AM bp-2088432d-a353-48b7-9e60-2c8fe2150414 15-Apr-15 12:04 AM bp-f7be253b-ab1a-42e5-8192-ea25d2150414 15-Apr-15 12:03 AM bp-be1e15f7-d500-42f8-b163-2194b2150414 15-Apr-15 12:01 AM bp-54b35830-0688-4e1c-8f41-2c3d02150414 14-Apr-15 11:59 PM bp-d9e33dbc-5e65-482e-a604-01a842150414 14-Apr-15 11:46 PM bp-3b9d69d2-a9f3-4999-aebb-09b982150414 14-Apr-15 11:45 PM

The crash report flagged these programs;

Signature RtlpCallQueryRegistryRoutine

avcuf32.dll = BitDefender

igd10umd32.dll = Intel(R) Graphics Technology

Disable BitDefender.

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