Invisible Firefox process exists some where even after the process is killed.

[Courtney R. Spencer]

On Thu, Oct 7, 2010 at 8:33 AM, Siju George <sgeorge.ml at gmail.com> wrote:
<snip>
>
> "Firefox is already running, but is not responding. To open a new
> window, you must first close the existing Firefox process, or restart
> your system."
>
> There is no process corresponding to firefox in ps aux when this happens.
>
> I have to restart my system once in 40-60 minutes to use firefox :-(
<snip>

Did you check for the presence of a lock file?

ls ~/.mozilla/firefox/*/.parentlock
rm -f ~/.mozilla/firefox/*/.parentlock


Regards,
Courtney