We're sorry to hear that Firefox is crashing. In order to assist you better, please follow the steps below to provide us crash ID's to help us learn more about your crash.

1. Enter about:crashes in the address bar (that's where you enter your website URL) and press Enter. You should now see a list of submitted crash reports.
2. Copy the 5 most recent crash ID's that you see in the crash report window and paste them into your response here.

Thank you for your help!

More information and further troubleshooting steps can be found in the Troubleshoot Firefox crashes (closing or quitting unexpectedly) article.

Many dynamic pages use the Flash plugin. This is some standard guidance that addresses the most common issues with the Flash player. I'm sure you've seen some of it before, but just in case:

(1) Make sure all recorders/downloaders that interact with Flash media are as up-to-date as possible, or disable them.

(2) Disable hardware graphics acceleration in Firefox and in Flash

(A) In Firefox, un-check the box here and restart:

orange Firefox button (or Tools menu) > Options > Advanced > General > "Use hardware acceleration when available"

(B) In Flash, see this support article from Adobe: http://helpx.adobe.com/flash-player/kb/video-playback-issues.html#main_Solve_video_playback_issues

(3) Disable protected mode (Windows Vista/7/8)

See this support article from Adobe under the heading "Last Resort": Adobe Forums: How do I troubleshoot Flash Player's protected mode for Firefox?

It's a new install so I have only the one crash report saved:

   bp-4c247d40-94b7-4635-85a7-517392130629

That crash signature is associated with a couple of bug reports. One of them mentions a problem if you are running an older version of Comodo Internet Security:

CIS 5.12 is out of date, users are supposed to upgrade to CIS 6.0 to get rid of this problem.
Download link: http://download.comodo.com/cis/download/installs/2000/standalone/cispremium_installer.exe

I don't know whether that is relevant to you. Perhaps the Flash issues are more pertinent.

Hello rt8and221, you can also try to boot the computer in Windows Safe mode with network support (press F8 on the boot screen) and check firefox again.

(If works in Windows Safe mode then you have a problem with other software, like security software (Comodo ?) or maybe a system driver, that is running on your computer).

thank you

Thank you. Firefox worked in Windows Safe mode. I don't have Comodo but I uninstalled all but the essentials and Firefox is working again.