Firefox Browser support (keepassxc extension?)
In order to fully replace KeepassXC one missing feature is browser support. It would be even better to support Epiphany (which doesn't have KeepassXC support) but I don't know if it's possible with current version of Epiphany.
[UPDATE: Epiphany support in the form of the org.freedesktop.secrets dbus service is tracked in #135]
Edited by Sebastian Spaeth