after updating Kubuntu from 20 to 22, Firefox has been forcefully installed from snap. After that, I cannot download and save any file at any place, not only in home directory. I've given all explicit permissions to Firefox in the Kubuntu's software manager (Discover) with no effect. Also, I have a similar problems in other apps installed from snap. What else can I try to do to give all permissions to those apps?
UPD1. The previous Kubuntu version was 20.04.4. I updated to 22.04.
UPD2. Output for snap connections firefox
Interface Plug Slot Notes
audio-playback firefox:audio-playback :audio-playback -
audio-record firefox:audio-record :audio-record -
avahi-observe firefox:avahi-observe :avahi-observe -
browser-support firefox:browser-sandbox :browser-support -
camera firefox:camera :camera -
content[gnome-3-38-2004] firefox:gnome-3-38-2004 gnome-3-38-2004:gnome-3-38-2004 -
content[gtk-3-themes] firefox:gtk-3-themes gtk-common-themes:gtk-3-themes -
content[icon-themes] firefox:icon-themes gtk-common-themes:icon-themes -
content[sound-themes] firefox:sound-themes gtk-common-themes:sound-themes -
cups-control firefox:cups-control :cups-control -
dbus - firefox:dbus-daemon -
desktop firefox:desktop :desktop -
desktop-legacy firefox:desktop-legacy :desktop-legacy -
gsettings firefox:gsettings :gsettings -
hardware-observe firefox:hardware-observe :hardware-observe -
home firefox:home :home manual
joystick firefox:joystick :joystick -
mpris - firefox:mpris -
network firefox:network :network -
network-observe firefox:network-observe :network-observe manual
opengl firefox:opengl :opengl -
personal-files firefox:dot-mozilla-firefox :personal-files -
removable-media firefox:removable-media :removable-media -
screen-inhibit-control firefox:screen-inhibit-control :screen-inhibit-control -
system-files firefox:etc-firefox-policies :system-files -
system-packages-doc firefox:system-packages-doc :system-packages-doc -
u2f-devices firefox:u2f-devices :u2f-devices -
unity7 firefox:unity7 :unity7 -
upower-observe firefox:upower-observe :upower-observe -
wayland firefox:wayland :wayland -
x11 firefox:x11 :x11 -
