In the address bar, type about:crashes<enter>. Note: If any reports do not have BP- in front of the numbers/letters, click it to submit them.

The crash report is several pages of data. We need the report numbers to see the whole report.

Using your mouse, mark the most recent 7 - 10 Submitted crash reports, and copy them. Now go to the reply box and paste them in.

For more help on crash reports, see; https://support.mozilla.org/en-US/kb/firefox-crashes-asking-support

The crash data I sent with the first post is all I have. If I click on view I get several tabs of info. Do you want that?

bp-7ab6acc4-f059-4d17-b052-de3f80200828 Signature: mozilla::layers::SyncObjectD3D11Host::Synchronize

MOZ_CRASH Reason (Sanitized) : MOZ_CRASH(GFX: D3D11 normal status timeout)

Crash Reason EXCEPTION_BREAKPOINT

This is for Sumo's Related Bugs 1584779 RESOLVED DUPLICATE Crash in [@ mozilla::layers::SyncObjectD3D11Host::Synchronize]

1560656 RESOLVED DUPLICATE Crash in [@ mozilla::layers::SyncObjectD3D11Host::Synchronize]

1560655 RESOLVED DUPLICATE Crash in [@ mozilla::layers::SyncObjectD3D11Host::Synchronize]

1560654 NEW --- Crash in [@ mozilla::layers::SyncObjectD3D11Host::Synchronize]

1459233 RESOLVED FIXED Crash in mozilla::layers::SyncObjectD3D11Host::Synchronize

Let’s do a full clean re-install;

Note: Firefox comes in three or more folders on all computers. They are;

Maintenance: (Programs Folder) <Windows Only> Firefox itself: (Programs Folder) And two folders in the profile of each user on the computer for each Firefox profile for that user.

If you remove the Firefox folder, the user profiles would not be affected.

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) Note: Check Both Folders

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; https://support.mozilla.org/en-US/kb/install-firefox-linux

If you downloaded and installed the binary package from the Firefox download page, simply remove the folder Firefox in your home directory. http://www.mozilla.org/firefox#desktop ++++++++++++++++++++++++++++ Look for, and remove any Mozilla or Firefox program folders. Do not remove the Mozilla Thunderbird folder if there is one.

Do Not remove any profile folders.

After rebooting the computer, run a registry scanner if you have one. Then run the installer. +++++++++++++++++++++++++++ If there is a problem, start your Computer in safe mode and try again.

http://encyclopedia2.thefreedictionary.com/Linux+Safe+Mode This shows how to Start all Computers in Safe Mode; Free Online Encyclopedia

That didn't work.

I did fix it... I think. I deleted the default-release profile and so far FireFox hasn't not crashed.

Thanks for your help. SJ

That was very good work. Well Done. Please flag your last post as Solved Problem as this can help others with similar problems.