Comment 2 for bug 1781906

Current stable (233) is still not using content interface, while edge (248 right now) does use content interface.

marco@tricky:~:✗ $ cat /run/snapd/ns/snap.telegram-desktop.fstab
/var/lib/snapd/hostfs/usr/local/share/fonts /usr/local/share/fonts none bind,ro 0 0
/var/lib/snapd/hostfs/usr/share/fonts /usr/share/fonts none bind,ro 0 0
/var/lib/snapd/hostfs/var/cache/fontconfig /var/cache/fontconfig none bind,ro 0 0

marco@tricky:~:✓ $ cat /var/lib/snapd/mount/snap.telegram-desktop.fstab
/snap/gtk-common-themes/319/share/icons/Adwaita /snap/telegram-desktop/248/usr/share/icons/Adwaita none bind,ro 0 0
/snap/gtk-common-themes/319/share/icons/hicolor /snap/telegram-desktop/248/usr/share/icons/hicolor none bind,ro 0 0
/snap/gtk-common-themes/319/share/icons/HighContrast /snap/telegram-desktop/248/usr/share/icons/HighContrast none bind,ro 0 0
/snap/gtk-common-themes/319/share/icons/Humanity /snap/telegram-desktop/248/usr/share/icons/Humanity none bind,ro 0 0
/snap/gtk-common-themes/319/share/icons/Humanity-Dark /snap/telegram-desktop/248/usr/share/icons/Humanity-Dark none bind,ro 0 0
/snap/gtk-common-themes/319/share/icons/ubuntu-mono-dark /snap/telegram-desktop/248/usr/share/icons/ubuntu-mono-dark none bind,ro 0 0
/snap/gtk-common-themes/319/share/icons/ubuntu-mono-light /snap/telegram-desktop/248/usr/share/icons/ubuntu-mono-light none bind,ro 0 0
/snap/gtk-common-themes/319/share/icons/DMZ-Black /snap/telegram-desktop/248/usr/share/icons/DMZ-Black none bind,ro 0 0
/snap/gtk-common-themes/319/share/icons/DMZ-White /snap/telegram-desktop/248/usr/share/icons/DMZ-White none bind,ro 0 0
/snap/gtk-common-themes/319/share/icons/Solus /snap/telegram-desktop/248/usr/share/icons/Solus none bind,ro 0 0
/snap/gtk-common-themes/319/share/icons/communitheme /snap/telegram-desktop/248/usr/share/icons/communitheme none bind,ro 0 0
/snap/gtk-common-themes/319/share/icons/Suru /snap/telegram-desktop/248/usr/share/icons/Suru none bind,ro 0 0
/var/lib/snapd/hostfs/usr/share/fonts /usr/share/fonts none bind,ro 0 0
/var/lib/snapd/hostfs/usr/local/share/fonts /usr/local/share/fonts none bind,ro 0 0
/var/lib/snapd/hostfs/var/cache/fontconfig /var/cache/fontconfig none bind,ro 0 0
/snap/gtk-common-themes/319/share/sounds/communitheme /snap/telegram-desktop/248/usr/share/sounds/communitheme none bind,ro 0 0
/snap/gtk-common-themes/319/share/themes/Adwaita /snap/telegram-desktop/248/usr/share/themes/Adwaita none bind,ro 0 0
/snap/gtk-common-themes/319/share/themes/Adwaita-dark /snap/telegram-desktop/248/usr/share/themes/Adwaita-dark none bind,ro 0 0
/snap/gtk-common-themes/319/share/themes/HighContrast /snap/telegram-desktop/248/usr/share/themes/HighContrast none bind,ro 0 0
/snap/gtk-common-themes/319/share/themes/Ambiance /snap/telegram-desktop/248/usr/share/themes/Ambiance none bind,ro 0 0
/snap/gtk-common-themes/319/share/themes/Radiance /snap/telegram-desktop/248/usr/share/themes/Radiance none bind,ro 0 0
/snap/gtk-common-themes/319/share/themes/EvoPop /snap/telegram-desktop/248/usr/share/themes/EvoPop none bind,ro 0 0
/snap/gtk-common-themes/319/share/themes/EvoPop-Azure /snap/telegram-desktop/248/usr/share/themes/EvoPop-Azure none bind,ro 0 0
/snap/gtk-common-themes/319/share/themes/Arc /snap/telegram-desktop/248/usr/share/themes/Arc none bind,ro 0 0
/snap/gtk-common-themes/319/share/themes/Arc-Dark /snap/telegram-desktop/248/usr/share/themes/Arc-Dark none bind,ro 0 0
/snap/gtk-common-themes/319/share/themes/Arc-Darker /snap/telegram-desktop/248/usr/share/themes/Arc-Darker none bind,ro 0 0
/snap/gtk-common-themes/319/share/themes/Communitheme /snap/telegram-desktop/248/usr/share/themes/Communitheme none bind,ro 0 0

# cat /proc/self/mountinfo | grep -E "telegram-desktop|gtk-common-themes|core"
853 804 7:8 / /var/lib/snapd/hostfs/snap/gtk-common-themes/319 ro,nodev,relatime master:41 - squashfs /dev/loop8 ro
867 804 7:20 / /var/lib/snapd/hostfs/snap/telegram-desktop/248 ro,nodev,relatime master:55 - squashfs /dev/loop20 ro
870 804 7:25 / /var/lib/snapd/hostfs/snap/core/4650 ro,nodev,relatime master:58 - squashfs /dev/loop25 ro
871 804 7:24 / /var/lib/snapd/hostfs/snap/core/4830 ro,nodev,relatime master:59 - squashfs /dev/loop24 ro
874 804 7:31 / /var/lib/snapd/hostfs/snap/core/4917 ro,nodev,relatime master:62 - squashfs /dev/loop31 ro
880 804 7:34 / /var/lib/snapd/hostfs/snap/telegram-desktop/243 ro,nodev,relatime master:68 - squashfs /dev/loop34 ro
887 804 7:39 / /var/lib/snapd/hostfs/snap/telegram-desktop/246 ro,nodev,relatime master:73 - squashfs /dev/loop39 ro
902 804 7:56 / /var/lib/snapd/hostfs/snap/gtk-common-themes/3 ro,nodev,relatime master:88 - squashfs /dev/loop56 ro
1213 1203 7:8 / /snap/gtk-common-themes/319 ro,nodev,relatime master:41 - squashfs /dev/loop8 ro
1226 1203 7:20 / /snap/telegram-desktop/248 ro,nodev,relatime master:55 - squashfs /dev/loop20 ro
1229 1203 7:25 / /snap/core/4650 ro,nodev,relatime master:58 - squashfs /dev/loop25 ro
1230 1203 7:24 / /snap/core/4830 ro,nodev,relatime master:59 - squashfs /dev/loop24 ro
1233 1203 7:31 / /snap/core/4917 ro,nodev,relatime master:62 - squashfs /dev/loop31 ro
1239 1203 7:34 / /snap/telegram-desktop/243 ro,nodev,relatime master:68 - squashfs /dev/loop34 ro
1244 1203 7:39 / /snap/telegram-desktop/246 ro,nodev,relatime master:73 - squashfs /dev/loop39 ro
1381 1203 7:56 / /snap/gtk-common-themes/3 ro,nodev,relatime master:88 - squashfs /dev/loop56 ro
805 1182 8:1 /tmp/snap.1000_telegram-desktop_AciT0x/tmp /tmp rw,noatime - ext4 /dev/sda1 rw,errors=remount-ro,data=ordered