[Firefox flatpak] key exchange failed

[vasyugan]

Expected Behavior

The keepassxc extension should just work (tm) with flatpak packaged firefox as with native firefox builds

Current Behavior

I just installed the official firefox flatpak from flathub

flatpak install https://flathub.org/beta-repo/appstream/org.mozilla.firefox.flatpakref

I see that it can't connect to my keepassxc. The debugger says:

Error 5: Die Verbindung zu KeePassXC ist nicht möglich. Überprüfen Sie, ob die Browser-Integration in den KeePassXC-Einstellungen aktiviert ist. keepass.js:1062:13
Connecting to native messaging host org.keepassxc.keepassxc_browser keepass.js:979:13
Failed to connect: Unknown error keepass.js:949:13
Error: No content script available for this tab. keepass.js:1180:25
Error 9: Schlüsselaustausch war nicht erfolgreich. keepass.js:1062:13

Debug info

KeePassXC -2.5.3
KeePassXC-Browser - 1.5.4
Operating system: Linux
Browser: Firefox (official flatpak from flathub-beta)

[varjolintu]

AFAIK, Native Messaging doesn't work with flatpak or snap. KeePassXC can be installed as a snap or flatpak though, but your browser must be installed via the package manager.

[vasyugan]

It seems, this needs a change in XDG desktop portal and Firefox, see this comment by a mozilla developer .

[droidmonkey]

That's a great response! I wish the browsers would come up with a standard secure communication protocol that can broker a trust relationship with a native application. Stdio is great, but it carries with it accessibility requirements. Using dbus or a more portable (between operating systems) broker would be much preferred all around.