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> Firefox on KDE uses the GTK filepicker. No thumbnails.

Not if you set the GTK_USE_PORTAL environment variable.

    $ GTK_USE_PORTAL=1 firefox
The above will make Firefox use the KDE filepicker.



So they say. But I could never get that to work, with KDE/Plasma the dialog just never shows up.


An AppArmor rule used to prevent it from working on my system.


Did you install the KDE portal and restart the portal process? When I initially tested it the gtk portal was installed so it used that.

https://m.youtube.com/watch?v=BGHnVF_WWls


I just set this up today and found that one also must install the xdg-desktop-portal and xdg-desktop-portal-kde packages. I then added GTK_USE_PORTAL=1 to .profile and relogged.




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