GNOME Shell extensions have a UUID property; this key lists extensions which should be disabled, even if loaded as part of the current mode. You can also manipulate this list with the EnableExtension and DisableExtension D-Bus methods on org.gnome.Shell. This key takes precedence over the “enabled-extensions” setting.
GNOME Shell will only load extensions that claim to support the current running version. Enabling this option will disable this check and try to load all extensions regardless of the versions they claim to support.
The shell will request a password when an encrypted device or a remote filesystem is mounted. If the password can be saved for future use a “Remember Password” checkbox will be present. This key sets the default state of the checkbox.