GNOME Shell 3.35.91 extension's preferences doesn't load

Status changed to 'Confirmed' because the bug affects multiple users.

This sounds like https://gitlab.gnome.org/GNOME/gnome-shell/issues/2317 so let's track that...

This bug was fixed in the package gnome-shell - 3.36.0-2ubuntu1

---------------
gnome-shell (3.36.0-2ubuntu1) focal; urgency=medium

  * Merge with Debian. Ubuntu bugs resolved since 3.35.91-1ubuntu2:
    - gnome-shell crashed when enable-animations was false (LP: #1866044)
    - Overview animations were not reliably smooth (LP: #1725180)
    - Higher than necessary CPU usage on mouse movement (LP: #1848951)
    - Extension's preferences did not load (LP: #1866146)
  * debian/control:
    - Breaks yaru (<< 20.04.3~)
    - Breaks gnome-session (<< 3.35.3-1ubuntu4~) as per gdm yaru gresources
    - Breaks gnome-shell-extension-ubuntu-dock (<< 67ubuntu20.04.3)
    - Update Vcs-* to point to salsa ubuntu branches
  * ubuntu.json: Use Yaru gresource file for theming in ubuntu mode
  * debian/patches: Refresh
  * d/p/overview-Fade-in-out-over-the-desktop-instead-of-replacin.patch:
    - Fade in/out the desktop instead of replacing it (LP: #1847712)
  * d/p/ubuntu/gdm_alternatives.patch:
    - Set the default theme resource for gdm session to 'gdm3-theme.gresource'
    - Alias the default gnome-shell.css to gdm3.css
  * gnome-shell-common.install: Don't install compiled css file anymore
  * gnome-shell-common.{preinst,prerm}:
    - Remove obsolete alternative gdm3.css symlink
  * gnome-shell-common.postinst:
    - Set gnome-shell-theme.gresource as alternative for gdm3-theme.gresource
  * Remaining changes from debian:
    + Replace gnome-backgrounds dep with ubuntu-wallpapers and Suggests
      gnome-themes-standard-data, gnome-backgrounds
    + Add some Recommends:
      - ubuntu-session (| gnome-session) to have the ubuntu session available
      - xserver-xorg-legacy
      - yaru-theme-gnome-shell for the default ubuntu theming
    + Update debian/gbp.conf with Ubuntu settings
    + gnome-shell-common.prerm: Remove deprecated ubuntu theme alternative
    + ubuntu/desktop_detect.patch:
      - add caching for desktop detection to avoid querying the current
        desktop env variable as iterate through the list each time. For the
        time of the Shell process, we can expect this env variable to stay
        stable.
    + ubuntu/smarter_alt_tab.patch:
      - quick alt-tab (without showing up the switcher) switch only between
        the last window of the last 2 applications to be focused instead of
        raising all windows of those apps.
    + ubuntu/lightdm-user-switching.patch:
      - Allow user switching when using LightDM.
    + ubuntu/lock_on_suspend.patch
      - Respect Ubuntu's lock-on-suspend setting.
    + ubuntu/background_login.patch
      - Change default background color as we modified the default GDM color
        for our ubuntu session.
    + ubuntu/gdm_alternatives.patch
      - Add support for GDM3 theme alternatives
    + optional-hot-corner.patch
      - enable patch proposed by upstream developer already in package (but
        not in series) to add a settings for optional hot corner activation.
    + main-show-an-error-message-on-gnome-shell-crash.patch,
      global-make-possible-to-set-debug-flags-dynamically.patch,
      main-increase-the-granularity-of-backtraces-in-SHELL_DEBU.patch,
      main-add-backtrace-c...

Not fixed yet in 3.36.0-2ubuntu1

You need to run:

sudo apt install gnome-shell-extension-prefs

to make extension preferences work in Ubuntu's packaging of gnome-shell.

Settings are working correctly with update and installation of gnome-shell-extension-prefs

Thanks

I don't think the user should need to take additional action to install this package - it should already be there, as in other distros including 3.36. This package has been present by default in previous versions of Ubuntu as well.