Comment 9 for bug 2036765

I see two options:
a) just use "--ignore-running", i.e. "snap refresh --channel=... --ignore-running firefox"
b) use "snap switch --channel=..." and just let snapd deal with it on the next auto-refresh

Both have pros/cons, but I would lean slightly towards (a) because the release upgrader is already telling users to close apps (iirc?) and that running apps may become unstable. In general I would also assume that stable and stable/ubuntu-23.10 point to the same revision so for the most part it would be a no-op. And when it's not there is probably a good reason so we should upgrade.

Hope this helps!