My desktop view is taken up completely by a frozen window from the chromium browser and I cannot manage to close it, switch windows, bring up the launcher or minimize it.
How can I resolve this without rebooting or losing my session?
Press Ctrl+Alt+T to bring up a terminal and then use
If that doesn't work you should be able to get to a TTY with Ctrl+Alt+F1. Use the killall command there and press Ctrl+Alt+F7 to get back.
You can try running
That should force it to close.