[Pkg-mozext-maintainers] Bug#895403: enigmail extension doesn't show up if the enigmail.org xpi was previously installed

[Paride Legovini]

Package: enigmail
Version: 2:2.0.1-1
Severity: normal

Dear Maintainers,

After installing and removing the official .xpi extension from
enigmail.org, the extension from the ‘enigmail’ Debian package doesn't
show up in Thunderbird.

Steps to reproduce:

0. Close Thunderbird, move ~/.thunderbird to a safe location.
1. Install thunderbird/experimental, uninstall enigmail.
2. Download the enigmail xpi file from enigmail.org, start Thunderbird
   and install it. The extension shows up and works fine.
3. Uninstall the extension from the Thunderbird GUI and close it.
4. Install enigmail/experimental.
5. Start Thunderbird. The extension doesn't show up (not even disabled).

If step 2 is skipped, the enigmail extension from the Debian package
works fine.

Paride

*** Reporter, please consider answering these questions, where appropriate ***

   * What led up to the situation?
   * What exactly did you do (or not do) that was effective (or
     ineffective)?
   * What was the outcome of this action?
   * What outcome did you expect instead?

*** End of the template - remove these template lines ***


-- System Information:
Debian Release: buster/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 4.15.0-2-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages enigmail depends on:
ii  gnupg                    2.2.5-1
ii  gnupg2                   2.2.5-1
ii  gpg-agent [gnupg-agent]  2.2.5-1
ii  thunderbird              1:60.0~b2-1

Versions of packages enigmail recommends:
ii  pinentry-gnome3 [pinentry-x11]  1.1.0-1

enigmail suggests no packages.