Re: Plasma file dialogs in Thunderbird

On 6/7/26 11:46 AM, Andrei Borzenkov wrote:
> 07.06.2026 18:58, gumb via openSUSE Users wrote:
>> On 07/06/2026 15:03, Andrei Borzenkov wrote:
>>>
>>> Configuration editor - widget.use-xdg-desktop-portal.*
>>>
>>> 15.6 had kmozillahelper which is no more present in 16.0 (and is auto-
>>> removed on update).
>>>
>>> You did not say where your Firefox comes from.
>>
>> My Firefox is also the standard esr version from the oss repo. By
>> comparing the entries in about:config for both FF and TB for the various
>> entries under widget.use-xdg-desktop-portal.* I could see one difference.
>>
>> widget.use-xdg-desktop-portal.file-picker was set to 2 in Thunderbird,
>> but was showing 1 in Firefox,
> 
> 
> Indeed. It is set by the MozillaFirefox-branding-openSUSE package.

I found a helpful search of the firefox source code that will pull in 
all the settings and value for each of the about:config settings:

https://searchfox.org/firefox-release/source/browser/app/profile/firefox.js

For example searching "widget.use-xdg-desktop-portal" pulls in:

# Whether to use gtk portal for the file picker.
#  - 0: never
#  - 1: always
#  - 2: auto (true for flatpak or GTK_USE_PORTAL=1, false otherwise)
- name: widget.use-xdg-desktop-portal.file-picker
   type: int32_t
   value: 2
   mirror: always

# Whether to use gtk portal for the mime handler.
#  - 0: never
#  - 1: always
#  - 2: auto (for now only true for flatpak, see bug 1516290)
- name: widget.use-xdg-desktop-portal.mime-handler
   type: int32_t
   value: 2
   mirror: always

# Whether to use XDG portal for native messaging.
# https://github.com/flatpak/xdg-desktop-portal/issues/655
#  - 0: never
#  - 1: always
#  - 2: auto (true for snap and flatpak or GTK_USE_PORTAL=1, false 
otherwise)
- name: widget.use-xdg-desktop-portal.native-messaging
   type: int32_t
   value: 0
   mirror: always

# Whether to try to use XDG portal for settings / look-and-feel information.
# 
https://flatpak.github.io/xdg-desktop-portal/#gdbus-org.freedesktop.portal.Settings
#  - 0: never
#  - 1: always
#  - 2: auto
- name: widget.use-xdg-desktop-portal.settings
   type: int32_t
   value: 2
   mirror: always

# Whether to use XDG portal for geolocation.
# 
https://flatpak.github.io/xdg-desktop-portal/#gdbus-org.freedesktop.portal.Location
#  - 0: never
#  - 1: always
#  - 2: auto
- name: widget.use-xdg-desktop-portal.location
   type: int32_t
   value: 2
   mirror: always
# Whether to use XDG portal for opening to a file.
# 
https://flatpak.github.io/xdg-desktop-portal/#gdbus-org.freedesktop.portal.OpenURI
#  - 0: never
#  - 1: always
#  - 2: auto (true for flatpak or GTK_USE_PORTAL=1, false otherwise)
- name: widget.use-xdg-desktop-portal.open-uri
   type: int32_t
   value: 2
   mirror: always

I've always had problems with the xdg-desktop-portal mess. This 
reference has helped with both openSUSE and Arch desktops. The setting 
of 2 (auto) on widget.use-xdg-desktop-portal.file-picker has always 
worked best for me on different desktops (providing the default GTK 
dialog if no other is found) 1 (always) has left me without any 
file-pickers on occasion.

-- 
David C. Rankin, J.D.,P.E.