🔍 See Original Answer on Ask Ubuntu 🔗
MainThread unfamiliar process suddenly showing up 18.04
August 6, 2020
November 24, 2022
Copy to clipboard: false
In addition to other answers there is a problem I encountered killing Firefox.
Previously I could use
sudo killall firefox. Now that has no effect and
pgrep firefox finds nothing.
For me to kill an unresponsive Firefox session I now need to use:
sudo killall /usr/lib/firefox/firefox
Note above problem isn’t limited to Ubuntu 18.04 as I’m using Ubuntu 16.04.6 LTS.