cannot kill -9 firefox 70.0.1 on 12.1

[Kurt Hackenberg]

On 2019-12-04 08:49, Tomasz CEDRO wrote:

> I have strange problems with Firefox 70.0.1 on 12.1 AMD64. It
> sometimes hangs my GUI (enlightenment), takes CPU and Memory. I can
> kill a window, then unable to start new window because "firefox is
> already running". I am unable to kill it even -9 as root :-(
> 
> What happened with old good kill -9 it does not seem to work anymore?
> 
> Did anyone experience similar problems?

That might mean that it's hung in the kernel for some reason. One 
well-known old way that can happen is in NFS, when an NFS server that's 
in use goes away. Is your home directory, or anything Firefox uses, on 
an NFS server?

You could use ps, and maybe other similar tools, to find out the state 
of the process or thread, maybe what it's waiting for.