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. 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.

Per request from Tyler Downer:

Crash ID: bp-08da7998-c7d7-45b2-99fd-c4b660180911 Crash ID: bp-7bac08e6-3302-4a92-95db-84ed20180911 Crash ID: bp-849cfd0e-3620-4ef5-b15e-1aca50180911

These are the only three crash reports dated today.

Thanks for the fast response!! Dave

Separate Security Issue: Update your Flash Player or remove it using these links; http://helpx.adobe.com/flash-player/kb/uninstall-flash-player-windows.html Uninstall Flash Player | Windows http://helpx.adobe.com/flash-player/kb/uninstall-flash-player-mac-os.html Uninstall Flash Player | Mac

Note: Windows users should download the ActiveX for Internet Explorer. and the plugin for Plugin-based browsers (like Firefox).

Note: Windows 8 and Windows 10 have built-in flash players and Adobe will cause a conflict. Install the plugin only. Not the ActiveX.

Flash Player Version: Version 30.0.0.154

https://get.adobe.com/flashplayer/ Direct link scans current system and browser Note: Other software is offered in the download. <Windows Only>

https://get.adobe.com/flashplayer/otherversions/ Step 1: Select Operating System Step 2: Select A Version (Firefox, Win IE . . . .) Note: Other software is offered in the download. <Windows Only> +++++++++++++++++++ See if there are updates for your graphics drivers https://support.mozilla.org/en-US/kb/upgrade-graphics-drivers-use-hardware-acceleration

Several Windows programs were flagged in the reports.

Perform a System File Check to fix corrupted system files

Win 7, 8, 10, Vista: https://support.microsoft.com/en-us/kb/929833 Win XP: https://answers.microsoft.com/en-us/windows/forum/all/windows-xp-scan-and-fix-disk-errors/6fe2827a-4be6-4bc1-8083-5139b5aa3a3d

Wiki - Windows 10 System File Check http://answers.microsoft.com/en-us/windows/wiki/windows_10-update/system-file-check-sfc-scan-and-repair-system-files/bc609315-da1f-4775-812c-695b60477a93

hi dave, thanks for reporting this. could you check if creating a new firefox profile for testing purposes also exhibits the same crash at startup? Profile Manager - Create, remove or switch Firefox profiles

I deleted the old profile and created a new one. Firefox 62 still does not work, although 'Nightly' works fine.

I also did the system scan, including DISM. Results showed no errors.

Thanks Dave

the issue seems to be caused by downgrading with the same profile touched by the recent nightly. if you switch back and forth between versions it would be best to use separate profiles for each release channel or use portable versions as firefox doesn't make any promises of being downwards compatible (though i guess we wouldn't want to crash either in this case)...

Thanks for the reply Phillip! Not to be argumentative, but I had been using vers 62 alongside Nightly for several months. I had even used the beta version of vers. 63 with Nightly with no problems. I don't mind beta testing, but didn't want to put all my faith in a beta! I stopped using the beta several weeks ago and went back to release versa. 62. It was only immediately after the Sept. Win 10 upgrade that they stopped working and playing well together lol! I can only believe Windows mad a change that Firefox couldn't deal with. I'm just not knowledgeable enough to diagnose it.

I removed vers 62 today (via Windows removal) and reinstalled it. Same issue. I removed it again and installed the vers. 63 beta, again with no improvement.

All that said, I have removed all Firefox except for Nightly from my PC. I'll hope that Nightly continues to work as well as it does!

Thanks Dave