alex.shpilkin [1] filed a orphan request for gnome-shell-extension- mconnect [2]:

The maintainer seems to have abandoned the package---they only ever released one version, and the current OOD notification is half a year old.

[1] https://aur.archlinux.org/account/alex.shpilkin/ [2] https://aur.archlinux.org/pkgbase/gnome-shell-extension-mconnect/