Thanks for the feedback Jan. Unfortunately I'm unable to reproduce the problem.
Which package installer program do you instruct firefox to use to open the downloaded deb?
I've tested gnome-software (the default) but it seems it's unable to handle side-loading debs, and gdebi-gtk, which correctly complains that the file doesn't exist any longer when trying to install it after closing firefox.
Thanks for the feedback Jan. Unfortunately I'm unable to reproduce the problem.
Which package installer program do you instruct firefox to use to open the downloaded deb?
I've tested gnome-software (the default) but it seems it's unable to handle side-loading debs, and gdebi-gtk, which correctly complains that the file doesn't exist any longer when trying to install it after closing firefox.