Cannot open browser when clicking on links in evince

[MakisH]

When clicking on a link from Evince (started from inside the Xfce desktop), Evince fails to open the link, reporting a permission denied error when calling /usr/lib/x86_64-linux-gnu/xfce4/exo-2/exo-helper-2.

At the same time, when performing the same task via ssh (vagrant ssh -- -Y), then firefox opens normally.

With a first look, I could not resolve it.

The exact error (in a pop-up):

Failed to launch preferred application for category "WebBrowser".

Failed to execute child process "/usr/lib/x86_64-linux-gnu/xfce4/exo-2/exo-helper-2" (Permission denied).

[MakisH]

In 8661219, I replaced the PDF reader from Evince (the default one in GNOME/Ubuntu), to Atril (the default one in Xfce/Xubuntu). My only lead was that this seemed to be a problem with the Xfce settings, so I tried to stick to Xfce-native applications.

This seems to fix it.