Browser quits immediately when session is empty
Close your final tab with Ctrl+W. Then reopen Epiphany. It should display the overview, but instead it will quit immediately and you'll need to launch Epiphany a second time to get to the overview.
$ git bisect bad
a4ee4eb32dbaee4c117afd0198f4496581604a18 is the first bad commit
commit a4ee4eb32dbaee4c117afd0198f4496581604a18
Author: Jan-Michael Brummer <jan.brummer@tabos.org>
Date: Wed Apr 17 20:53:09 2019 +0200
Close window after drag/drop last tab to another window
Fixes: https://gitlab.gnome.org/GNOME/epiphany/issues/731
:040000 040000 1792973a73f9854a34a9b53835014982020a6ed8 421b34fdd71e4416424fbb0bd371eab4d2997097 M src