[Bug 2065542] [NEW] Thunderbird snap unable to send or save messages with custom download dir location

[A]

Public bug reported:

Package: thunderbird
Version: 2:1snap1-0ubuntu3

I have KDE with custom downloads folder location (/mnt/M.2/Downloads in
my case), and when I try to send or save message I have msg box with
"error sending message"

In `journalctl -f` there is following message

kernel: audit: type=1400 audit(1715558212.734:570): apparmor="DENIED"
operation="mkdir" class="file" profile="snap.thunderbird.thunderbird"
name="/mnt/M.2/Downloads/thunderbird.tmp/" pid=52900 comm="thunderbird-
bin" requested_mask="c" denied_mask="c" fsuid=1000 ouid=1000

** Affects: thunderbird (Ubuntu)
     Importance: Undecided
         Status: New

** Package changed: ubuntu-release-upgrader (Ubuntu) => thunderbird
(Ubuntu)

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https://bugs.launchpad.net/bugs/2065542

Title:
  Thunderbird snap unable to send or save messages with custom download
  dir location

Status in thunderbird package in Ubuntu:
  New

Bug description:
  Package: thunderbird
  Version: 2:1snap1-0ubuntu3

  I have KDE with custom downloads folder location (/mnt/M.2/Downloads
  in my case), and when I try to send or save message I have msg box
  with "error sending message"

  In `journalctl -f` there is following message

  kernel: audit: type=1400 audit(1715558212.734:570): apparmor="DENIED"
  operation="mkdir" class="file" profile="snap.thunderbird.thunderbird"
  name="/mnt/M.2/Downloads/thunderbird.tmp/" pid=52900
  comm="thunderbird-bin" requested_mask="c" denied_mask="c" fsuid=1000
  ouid=1000

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