exo-preferred-applications should also use gvfs-mime. Maybe as an option only.

This can cause issues with older gtk2 applications like hexchat:

https://bugzilla.redhat.com/1112961
https://github.com/hexchat/hexchat/issues/663

>  TingPing commented on 30 Jun 2013
> 
> So just to verify run this command:
> 
>     gvfs-mime –set x-scheme-handler/http firefox.desktop
> 
> Then in HexChat run:
> 
>     /url http://google.com