Cannot open link from Flatpak app if the default browser is Flatpak-packaged Chromium

[hitomi-nakayama]

Operating System

Gentoo (default/linux/amd64/23.0/desktop)

XDG Desktop Portal version

1.18

XDG Desktop Portal version (Other)

No response

Desktop Environment

Other

Desktop Environment (Other)

Hyprland

Expected Behavior

Clicking on a link within a Flatpak app should open the link with my default browser. When I have Flatpak Chromium as my default browser, the link should open in that app.

Current Behavior

Clicking on a link inside of a Flatpak app does nothing.

Trying to run xdg-open inside of a Flatpak container produces the following output:

hitomi@machine ~ $ flatpak run --log-session-bus --command=bash us.zoom.Zoom
[📦 us.zoom.Zoom ~]$ xdg-open https://google.com
C1: -> org.freedesktop.DBus call org.freedesktop.DBus.Hello at /org/freedesktop/DBus
C2: -> org.freedesktop.DBus fake wildcarded AddMatch for org.freedesktop.portal
C3: -> org.freedesktop.DBus fake wildcarded AddMatch for org.mpris.MediaPlayer2.us.zoom.Zoom
C4: -> org.freedesktop.DBus fake wildcarded AddMatch for us.zoom.Zoom
C5: -> org.freedesktop.DBus fake wildcarded AddMatch for org.kde
C6: -> org.freedesktop.DBus fake AddMatch for org.freedesktop.ScreenSaver
C7: -> org.freedesktop.DBus fake GetNameOwner for org.freedesktop.ScreenSaver
C8: -> org.freedesktop.DBus fake ListNames
B1: <- org.freedesktop.DBus return from C1
B2: <- org.freedesktop.DBus signal org.freedesktop.DBus.NameAcquired at /org/freedesktop/DBus
B3: <- org.freedesktop.DBus return from C2
*SKIPPED*
B4: <- org.freedesktop.DBus return from C3
*SKIPPED*
B5: <- org.freedesktop.DBus return from C4
*SKIPPED*
B6: <- org.freedesktop.DBus return from C5
*SKIPPED*
B7: <- org.freedesktop.DBus return from C6
*SKIPPED*
B8: <- org.freedesktop.DBus return error org.freedesktop.DBus.Error.NameHasNoOwner from C7
*SKIPPED*
B9: <- org.freedesktop.DBus return from C8
C9: -> org.freedesktop.DBus fake GetNameOwner for org.freedesktop.DBus
C10: -> org.freedesktop.DBus fake GetNameOwner for org.freedesktop.portal.Desktop
C11: -> org.freedesktop.DBus fake GetNameOwner for org.freedesktop.portal.Documents
C12: -> org.freedesktop.DBus fake GetNameOwner for org.freedesktop.portal.Flatpak
C13: -> org.freedesktop.DBus fake GetNameOwner for org.kde.StatusNotifierWatcher
*SKIPPED*
B10: <- org.freedesktop.DBus return from C9
*SKIPPED*
B11: <- org.freedesktop.DBus return from C10
*SKIPPED*
B12: <- org.freedesktop.DBus return from C11
*SKIPPED*
B13: <- org.freedesktop.DBus return from C12
*SKIPPED*
B14: <- org.freedesktop.DBus return from C13
*SKIPPED*
C14: -> org.freedesktop.portal.Desktop call org.freedesktop.portal.OpenURI.OpenURI at /org/freedesktop/portal/desktop
B291: <- :1.20 return from C14

Steps to Reproduce

1. Install Chromium through Flatpak.
2. Set the Flatpak Chromium as your default browser. Run: xdg-settings set default-web-browser org.chromium.Chromium.desktop
3. Open a different Flatpak app and try to open a link. (The link will not open.)

Anything else we should know?

I have tested the following browsers. Links from Flatpak apps do not correctly open with these browsers:

• com.google.Chrome 126.0.6478.126-1
• io.github.ungoogled_software.ungoogled_chromium 126.0.6478.126-1-1
• org.chromium.Chromium 126.0.6478.126

This issue seems to only affect Chromium browsers packaged with Flatpak. I am able to open links with the Flatpak version of Firefox: org.mozilla.firefox 128.0. I also do not have this issue with the distro's www-client/chromium-126.0.6478.126.

Note: My xdg-desktop-portal and pipewire are compiled with the flatpak USE flag.

[swick]

I just tested this. Links from matrix opened in Firefox, then I ran xdg-settings set default-web-browser org.chromium.Chromium.desktop and the links started opening in Chromium.

Is this still an issue for you? Since this seems reproducible only on certain systems, can you narrows this down?