Hi all,
I've seen posts on the FF 37.0.1/Norton Toolbar situation and this may be related. Since "upgrading" to 37.0.1, my system often crashes on closure. I've reported this to Mozilla and learned that I'm not the only one to experience this. Two things prompted this post. First, people on the Mozilla forum noticed that some of the crash reports involved Norton. The second point is that I changed a password this morning and couldn't open ID Safe logins list from the toolbar until I shut down/restarted FF.
Ian