My firefox didn't respond when I wanted to download a picture from photos.google.com. Then I clicked "x" to close its window which has multiple tabs open.
Then I wanted to start firefox, but it didn't respond. I find there are several related processes in the output of
ps aux | grep -i firefox, but
kill their pid doesn't work. How can I remove the firefox-related processes, so that i can restart firefox?
The statuses of the firefox-related processes are
S+. What do they mean respectively?
My os is Ubuntu 14.04. Thanks.