for the record, I can also reproduce this in Gnome and MATE desktop environments and with a fresh new user and/or profile.
so it seems this is not limited to xmonad: whenever chrome is in another
workspace, calling "chromium foo" will SIGKILL the existing instance.
a.
--
The history of any one part of the earth, like the life of a soldier,
consists of long periods of boredom and short periods of terror.
- British geologist Derek V. Ager
