Hello joeywald, 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. On the keyboard, press [Windows] The image "Windows key" does not exist. + [R]. This should bring up a Run window that contains a text field.
2. In that text field, type %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 with bp- 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.

Hello Ideato

Please see crash report IDs below. Many thanks for your help!

Crash ID: bp-f2d9f33a-3f15-4428-b23d-0bfc52150320 Crash ID: bp-f730f989-2129-4960-af00-b29ab2150320 Crash ID: bp-faaeb78c-8b81-44b8-9a3c-14ffc2150320 Crash ID: bp-eec60d8c-fdce-4912-9587-affed2150315 Crash ID: bp-7d17315c-d5d6-4d4a-bee4-cd8272150315

The crash report flagged these programs;

Rooksbas.DLL = Windows

RapportTanzan.dll = Rapport

keyscramblerIE.dll = KeyScrambler = QFX Software Corporation

RapportUtil.dll = Rapport

atiumdag.dll = ATI Technologies Inc = Radeon DirectX Universal Driver

RapportGP.dll = Rapport

Perform a System File Check to fix corrupted system files http://www.sevenforums.com/tutorials/1538-sfc-scannow-command-system-file-checker.html

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

Download the current full installers for the above, and use them

Hello

I performed the scannow check (no problems) and checked for graphics driver updates (I have the latest version installed).

Good to hear. Now start on the others.

Sorry, Fred. I don't understand. What others?

FredMcD said

Download the current full installers for the above, and use them

Hi Fred

Did that and while I weas doing it the new Firefox update arrived. Don't know which cured the problem but everything seems OK now. Many thanks for your help.

Glad to help. Safe surfing.