MarsSeed [1] filed a request to merge thunderbird-appmenu [2] into
thunderbird-globalmenu [3]:
Has been submitted under a more appropriate name, and the target
package is actively maintained.
('appmenu' is a legacy name from Ubuntu Unity, but that feature is
called global menu in KDE and other desktop environments that have
implemented support for the same API.)
[1] https://aur.archlinux.org/account/MarsSeed/
[2] https://aur.archlinux.org/pkgbase/thunderbird-appmenu/
[3] https://aur.archlinux.org/pkgbase/thunderbird-globalmenu/
