[GauntletWizard]

And snapd has all of the information it needs to do all of this. "Is Firefox Running?" is a tricky question in a traditional package install, because there's a number of ways you can launch a program and "ps |grep firefox" isn't quite right. But that's not the case for snapd! It is the executor and all launches to Firefox have to pass through it; If you launch Firefox while it's running and there's an update queued, it should be able to pass that on to the old version, while still being able to handle "This program is exiting and has an update queued, so let's update it now".

Every critical piece of information is available to Snapd, and yet, they have chosen the wrong and broken implementation.