Firefox crashes after installing Yosemite

Question

I installed Yosemite last night and almost the first thing I noticed was that Firefox would crash when it opened.  I loaded it into safe mode and removed all my add-ons hoping that might help, but it still crashes.  I uninstalled it as well, but I'm still getting the crashes.  I have the latest version installed, but for now I can't use it much unless it's in safe mode.  Has anybody had the same issue, or would anybody have any suggestions on what the issue might be?
I'm using an iMac running Yosemite 10.10 with a 2.8 GHz Intel Core 7 processor with 32 GB of RAM.  Firefox is version 33.0.
Thanks for any and all help.
Mike

Answer 1

Here is what helped for me:
I created a new profile by backing up
/Users/myname/Library/Application\ Support/Firefox/Profiles
simply by adding ".bak":
/Users/myname/Library/Application\ Support/Firefox/Profiles.bak
and restarting Firefox.
It worked fine.
Then I stepwise copied back my places, keys etc as listed in
https://support.mozilla.org/en-US/kb/recovering-important-data-from-an-old-profi le#w_your-important-data-and-their-files
On my way I found that all the hangs and forced shutdowns had destroyed my places.sqlite - when I finally recovered the original file copying it from my HD-Backup it worked perfectly fine.
Afterwards I started reinstalling addons. noscript, adblock plus, greasemonkey worked so far, I'll check for the rest of them later.