Jeinzi  filed a orphan request for thunar-dropbox :
I tried contacting Maato via email on 2018-12-18, but he didn't respond yet. There are two pull requests, one porting the package to thunarx-3, and one adding a requested feature. Given thunar-dropbox- git by twa022 already points at my fork, I'd be happy to adopt the package and support it.
-- Julian Heinzel
 https://aur.archlinux.org/account/Jeinzi/  https://aur.archlinux.org/pkgbase/thunar-dropbox/