FadeMind [1] filed a deletion request for thunderbird-firetray-git [2]: https://aur.archlinux.org/packages/thunderbird-firetray/ is maintain and updated if needed. This git package is not needed anymore.
[1] https://aur.archlinux.org/account/FadeMind/ [2] https://aur.archlinux.org/pkgbase/thunderbird-firetray-git/
