FF29.0 crashes when loading with tab groups, loads fine without tab groups. WHY?

Question

I have about 16-18 tab groups (at least I did in FF28.0). When updating to FF29.0, FF crashed EVERY time when trying to load. I finally did a fresh reinstall of FF29.0. After reinstalling my 18 add-ons, I ran Session Manager and loaded a session from before I had updated to 29.0. It had all my tab groups! WOW, it loaded. Well, it loaded ONCE. It never loaded again. Crashes every time. I have saved sessionstore.bak and sessonstore.js at various times. I copied one from before the crashes and FF29.0 works just fine. It just won't work with all/any of my tab groups. Crashes every time while loading. If it won't work with my saved tab groups, I will be forced to go back to FF28.0. That would not be progress.

Answer 1

Hi,
Some of your reports are not complete which means something is causing the reports to not be uploaded fully. Please follow the steps to ensure your crash reports can be uploaded and your crashes stop.
#Stop your antivirus and scanners temporarily
#Disable hardware acceleration. See [https://support.mozilla.org/en-US/kb/troubleshoot-extensions-themes-to-fix-problems#w_turn-off-hardware-acceleration Turn off HA]
If that doesn't work then create a new profile as a test to check if your current profile is causing the problems.
See "Creating a profile":
*https://support.mozilla.org/kb/profile-manager-create-and-remove-firefox-profiles
*http://kb.mozillazine.org/Standard_diagnostic_-_Firefox#Profile_issues
If the new profile works then you can transfer some files from an existing profile to the new profile, but be careful not to copy corrupted files.
*http://kb.mozillazine.org/Transferring_data_to_a_new_profile_-_Firefox