coreyberla  filed an orphan request for nautilus-dropbox :
The maintainer appears to be to unresponsive. The upstream project
rarely updates and only recently has required an update because of a
breaking API change in Nautilus 43. I have a PR to the upstream
project nautilus-dropbox, but it has yet to be accepted (there hasn't
been any activity upstream in years). I have a link to a working
PKGBUILD in the comments.