I am migrating from one notebook running 19.10 to a new notebook running 20.04. I know how to migrate directly-installed programs like Firefox (e.g., copy ~/.mozilla).
But, how do I do the equivalent for snaps like Chromium? I would like to copy the settings, bookmarks, etc. I poked around ~/snap/chromium, but it does not feel like this data is contained there. And ~/.config/chromium seems to be from when it was not a snap, based on last-modified timestamps.