I have a mobile LTE modem that I connect to via Wifi. Whenever I connect via USB (for charging) Sierra opens a /Volumes/Web Connection Finder window. How can I prevent that?
I can't use bless as the volume is read-only.
I also tried setting
defaults write com.apple.frameworks.diskimages auto-open-ro-root -bool false
defaults write com.apple.frameworks.diskimages auto-open-rw-root -bool false
defaults write com.apple.finder OpenWindowForNewRemovableDisk -bool false
but they had no effect.