Some apps need XDG_CURRENT_DESKTOP=Unity

[jhasse]

• Dropbox
• Seafile (on Ubuntu, Fedora disables libappindicator support via a compile time switch)
• Slack

I think the problem is that many app developers don't know that GNOME Shell also supports appindicator via this extension so they add checks like this one: https://github.com/haiwen/seafile/commit/bb8eacce1cf999a32185c344e0737c2842eb60de#diff-b25e62244af579d5a0330d134c6fcb28R60

Maybe there's some kind of workaround for this or a better method to find out if appindicators should be used.