On Fri, 14 Nov 2014 22:02:47 -0800
Robert Peters <robertpeters9@...> wrote:

>  Iceweasel won't
> start, claiming that an instance of it is already running. 

Does "ps -ef | grep iceweasel" return anything?  If it
does, "killall iceweasel" and try to start it again.

E. Liddell