[K12OSN] Firefox won't start for one user

[Jim Anderson]

Hello,

I have a user who, no matter where he logs in, cannot start Firefox now.
He gets a message that Firefox is already running.  We're using K12LTSP
v.5.  Other users have no trouble starting Firefox.

Unfortunately, I am not able to be at the site.  I don't know if he
somehow created another profile and I am unable to question him or view
what he is doing directly.  There is someone at the site who I can talk
through a fix.

Jim Anderson