User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:99.0) Gecko/20100101 Firefox/99.0

Steps to reproduce:

1. I'm using Ubuntu 22.04
2. I mounted internal hard disk to /mnt folder
3. Firefox snap connection to removable-media is done.
4. I started latest firefox snap.
5. When I try to download file or save page to hard disks mounted to /mnt download process doesn't start.
6. However download to /media works as expected.
7. Moreover another snap GIMP saves files to /mnt.

pnck@ubuntupc:~$ lsb_release -rd
Description: Ubuntu 22.04 LTS
Release: 22.04

pnck@ubuntupc:~$ apt-cache policy firefox
firefox:
Installed: (none)
Candidate: 1:1snap1-0ubuntu2
Version table:
1:1snap1-0ubuntu2 500
500 http://ru.archive.ubuntu.com/ubuntu jammy/main amd64 Packages

pnck@ubuntupc:~$ snap info firefox
name: firefox
summary: Mozilla Firefox web browser
publisher: Mozilla✓
store-url: https://snapcraft.io/firefox
license: unset
description: |
Firefox is a powerful, extensible web browser with support for modern web application
technologies.
commands:

• firefox
  snap-id: 3wdHCAVyZEmYsCMFDE9qt92UV8rC8Wdk
  tracking: latest/stable/ubuntu-22.04
  refresh-date: 2 days ago, at 19:34 MSK
  channels:
  latest/stable: 99.0.1-1 2022-04-13 (1232) 163MB -
  latest/candidate: 100.0-2 2022-05-02 (1300) 168MB -
  latest/beta: 101.0b1-1 2022-05-03 (1306) 169MB -
  latest/edge: 102.0a1 2022-05-03 (1307) 180MB -
  esr/stable: 91.8.0esr-1 2022-04-05 (1184) 161MB -
  esr/candidate: 91.9.0esr-1 2022-04-27 (1284) 161MB -
  esr/beta: ↑
  esr/edge: ↑
  installed: 99.0.1-1 (1232) 163MB -

pnck@ubuntupc:~$ 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 -
joystick firefox:joystick :joystick -
mpris - firefox:mpris -
network firefox:network :network -
network-observe firefox:network-observe - -
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 -

pnck@ubuntupc:~$ ls -la /mnt/
total 16
drwxr-xr-x 4 root root 4096 May 1 20:00 .
drwxr-xr-x 20 root root 4096 May 1 19:36 ..
drwxr-xr-x 11 pnck pnck 4096 May 3 13:33 Data
drwxrwxr-x 8 pnck pnck 4096 Jun 5 2021 VMs

pnck@ubuntupc:~$ mount | grep -e firefox -e mnt -e gimp
/var/lib/snapd/snaps/firefox_1232.snap on /snap/firefox/1232 type squashfs (ro,nodev,relatime,errors=continue,x-gdu.hide)
/var/lib/snapd/snaps/gimp_383.snap on /snap/gimp/383 type squashfs (ro,nodev,relatime,errors=continue,x-gdu.hide)
/dev/sda1 on /mnt/VMs type ext4 (rw,nosuid,nodev,relatime,uhelper=udisks)
/dev/mapper/data_vg-data_lv on /mnt/Data type ext4 (rw,nosuid,nodev,relatime,uhelper=udisks)
nsfs on /run/snapd/ns/snapd-desktop-integration.mnt type nsfs (rw)
nsfs on /run/snapd/ns/snap-store.mnt type nsfs (rw)
nsfs on /run/snapd/ns/firefox.mnt type nsfs (rw)
nsfs on /run/snapd/ns/gimp.mnt type nsfs (rw)

Actual results:

1. Download process doesn't start
2. There are not information about this download in download history
3. There are not new files in destination directory

Expected results:

Download process should displays the progress bar. Firefox should display this download in history. And file should be saved in subdirectory in /mnt path.

The Bugbug bot thinks this bug should belong to the 'Core::Widget: Gtk' component, and is moving the bug to that component. Please correct in case you think the bot is wrong.

Can you check whether there are apparmor denials reported in the system journal when the problem happens?

journalctl -f | grep DEN

pnck@ubuntupc:$ journalctl -f | grep DEN
May 05 18:26:02 ubuntupc kernel: audit: type=1400 audit(1651764362.533:122): apparmor="DENIED" operation="open" profile="snap.firefox.firefox" name="/run/mount/utab" pid=3673 comm="firefox" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0
May 05 18:26:02 ubuntupc audit[3673]: AVC apparmor="DENIED" operation="open" profile="snap.firefox.firefox" name="/run/mount/utab" pid=3673 comm="firefox" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0
May 05 18:26:02 ubuntupc audit[942]: USER_AVC pid=942 uid=102 auid=4294967295 ses=4294967295 subj=? msg='apparmor="DENIED" operation="dbus_method_call" bus="system" path="/org/freedesktop/hostname1" interface="org.freedesktop.DBus.Properties" member="GetAll" mask="send" name=":1.125" pid=3673 label="snap.firefox.firefox" peer_pid=4788 peer_label="unconfined"
May 05 18:26:02 ubuntupc audit[942]: USER_AVC pid=942 uid=102 auid=4294967295 ses=4294967295 subj=? msg='apparmor="DENIED" operation="dbus_method_call" bus="system" path="/org/freedesktop/hostname1" interface="org.freedesktop.DBus.Properties" member="GetAll" mask="send" name=":1.125" pid=3673 label="snap.firefox.firefox" peer_pid=4788 peer_label="unconfined"
May 05 18:26:02 ubuntupc audit[942]: USER_AVC pid=942 uid=102 auid=4294967295 ses=4294967295 subj=? msg='apparmor="DENIED" operation="dbus_method_call" bus="system" path="/org/freedesktop/hostname1" interface="org.freedesktop.DBus.Properties" member="GetAll" mask="send" name=":1.125" pid=3673 label="snap.firefox.firefox" peer_pid=4788 peer_label="unconfined"
May 05 18:26:02 ubuntupc kernel: audit: type=1107 audit(1651764362.613:123): pid=942 uid=102 auid=4294967295 ses=4294967295 subj=? msg='apparmor="DENIED" operation="dbus_method_call" bus="system" path="/org/freedesktop/hostname1" interface="org.freedesktop.DBus.Properties" member="GetAll" mask="send" name=":1.125" pid=3673 label="snap.firefox.firefox" peer_pid=4788 peer_label="unconfined"
May 05 18:26:02 ubuntupc kernel: audit: type=1107 audit(1651764362.613:125): pid=942 uid=102 auid=4294967295 ses=4294967295 subj=? msg='apparmor="DENIED" operation="dbus_method_call" bus="system" path="/org/freedesktop/hostname1" interface="org.freedesktop.DBus.Properties" member="GetAll" mask="send" name=":1.125" pid=3673 label="snap.firefox.firefox" peer_pid=4788 peer_label="unconfined"
May 05 18:26:02 ubuntupc kernel: audit: type=1107 audit(1651764362.613:127): pid=942 uid=102 auid=4294967295 ses=4294967295 subj=? msg='apparmor="DENIED" operation="dbus_method_call" bus="system" path="/org/freedesktop/hostname1" interface="org.freedesktop.DBus.Properties" member="GetAll" mask="send" name=":1.125" pid=3673 label="snap.firefox.firefox" peer_pid=4788 peer_label="unconfined"
May 05 18:26:38 ubuntupc audit[3673]: AVC apparmor="DENIED" operation="open" profile="snap.firefox.firefox" name="/etc/fstab" pid=3673 comm="firefox" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0
May 05 18:26:38 ubuntupc audit[3673]: AVC apparmor="DENIED" operation="open" profile="snap.firefox.firefox" name="/run/mount/utab" pid=3673 comm="firefox" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0
May 05 18:26:38 ubuntupc kernel: audit: type=1400 audit(1651764398.901:129): apparmor="DENIED" operation="open" profile="snap.firefox.firefox" name="/etc/fstab" pid=3673 comm="firefox" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0
May 05 18:26:38 ubuntupc kernel: audit: type=1400 audit(1651764398.905:130): apparmor="DENIED" operation="open" profile="snap.firefox.firefox" name="/run/mount/utab" pid=3673 comm="firefox" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0
May 05 18:26:40 ubuntupc audit[3673]: AVC apparmor="DENIED" operation="open" profile="snap.firefox.firefox" name="/etc/fstab" pid=3673 comm="firefox" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0
May 05 18:26:40 ubuntupc audit[3673]: AVC apparmor="DENIED" operation="open" profile="snap.firefox.firefox" name="/run/mount/utab" pid=3673 comm="firefox" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0
May 05 18:26:40 ubuntupc kernel: audit: type=1400 audit(1651764400.821:131): apparmor="DENIED" operation="open" profile="snap.firefox.firefox" name="/etc/fstab" pid=3673 comm="firefox" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0
May 05 18:26:40 ubuntupc kernel: audit: type=1400 audit(1651764400.825:132): apparmor="DENIED" operation="open" profile="snap.firefox.firefox" name="/run/mount/utab" pid=3673 comm="firefox" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0
May 05 18:26:43 ubuntupc audit[3673]: AVC apparmor="DENIED" operation="open" profile="snap.firefox.firefox" name="/etc/fstab" pid=3673 comm="firefox" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0
May 05 18:26:43 ubuntupc audit[3673]: AVC apparmor="DENIED" operation="open" profile="snap.firefox.firefox" name="/run/mount/utab" pid=3673 comm="firefox" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0
May 05 18:26:51 ubuntupc kernel: audit: type=1400 audit(1651764411.717:163): apparmor="DENIED" operation="open" profile="snap.firefox.firefox" name="/etc/fstab" pid=3673 comm="firefox" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0
May 05 18:26:51 ubuntupc kernel: audit: type=1400 audit(1651764411.717:164): apparmor="DENIED" operation="open" profile="snap.firefox.firefox" name="/run/mount/utab" pid=3673 comm="firefox" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0
May 05 18:26:51 ubuntupc audit[3673]: AVC apparmor="DENIED" operation="open" profile="snap.firefox.firefox" name="/etc/fstab" pid=3673 comm="firefox" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0
May 05 18:26:51 ubuntupc audit[3673]: AVC apparmor="DENIED" operation="open" profile="snap.firefox.firefox" name="/run/mount/utab" pid=3673 comm="firefox" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0
May 05 18:26:53 ubuntupc audit[3673]: AVC apparmor="DENIED" operation="open" profile="snap.firefox.firefox" name="/etc/fstab" pid=3673 comm="firefox" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0
May 05 18:26:53 ubuntupc audit[3673]: AVC apparmor="DENIED" operation="open" profile="snap.firefox.firefox" name="/run/mount/utab" pid=3673 comm="firefox" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0
May 05 18:26:53 ubuntupc kernel: audit: type=1400 audit(1651764413.173:165): apparmor="DENIED" operation="open" profile="snap.firefox.firefox" name="/etc/fstab" pid=3673 comm="firefox" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0
May 05 18:26:53 ubuntupc kernel: audit: type=1400 audit(1651764413.173:166): apparmor="DENIED" operation="open" profile="snap.firefox.firefox" name="/run/mount/utab" pid=3673 comm="firefox" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0
^C
pnck@ubuntupc:$ ls -la /etc/fstab
-rw-rw-r-- 1 root root 777 May 1 20:00 /etc/fstab
pnck@ubuntupc:~$ ls -la /run/mount/utab
-rw-r--r-- 1 root root 1456 May 5 18:26 /run/mount/utab

How do you mount to /mnt ? I'd guess it's not via something that removable-media expects, and this is why you dont have access ? Usually, drives mounted via gvfs are under /media as much as I can remember.

I'm having the same issue. Reported here: https://bugzilla.mozilla.org/show_bug.cgi?id=1773510

Andrey, can you repro on current versions as well? If you do, we could welcome a about:support as well as /usr/libexec/xdg-desktop-portal -rv and journalctl -f while reproducing.

Please attach about:support on the bug, not a third-party website

I dont see any SaveFile in the xdg-desktop-portal log shared, did you reproduce the issue when capturing it ?

Alexandre, I'm sorry, this message have been written by mistake. Bugzilla portal also has some bugs, something about s3 access.

After couple of updates the issue with firefox does not exist now. And I can download files to any location in /mnt.

We can close this bug i think. Because i can't reproduce it now.

(In reply to Andrey R. Masalov from comment #10)

Alexandre, I'm sorry, this message have been written by mistake. Bugzilla portal also has some bugs, something about s3 access.

For the about:support ? Weird, you should be able to attach it

After couple of updates the issue with firefox does not exist now. And I can download files to any location in /mnt.

We can close this bug i think. Because i can't reproduce it now.

Perfect, thanks for taking the time to verify!