

If you don’t plan on having it save passwords, you can add the following to the .desktop file your using for the Exec line:
–password-store=basic
The line for my chrome setup for some public computers at work is:
Exec=/usr/bin/google-chrome-stable --password-store=basic %U
So you’d just need to replace the file path to your chromium path and it should work.
If you do it at least semi regularly it isn’t really itchy (at least in my experience)!