Our manufacturing team noticed that the chromium kiosk was underlining misspelled words, which is probably not desirable in our application (though not a must change setting either.)
I found that if I launched in browser mode instead of kiosk mode, I could go into the settings and disable the spell check, but there doesn’t seem to be any way to pass a command line argument to change anything.
Since those settings would only live within the life of the container, I am not 100% sure the best way to save those settings, and get them to persist across multiple machines over multiple docker instances. I was able to locate the settings file, at /home/torizon/.config/chromium/Default/Preferences inside the container, but copying just this file, or the entire directory using the dockerfile is giving errors about not being able to read the lock files in the directory due to permissions, and usually crashing the container.
I am not sure a convenient way to work around that. If we just have to accept the spell check its not the end of the world, but it would be nice to be able to edit those settings if there was a convenient way to do so.