This is an upstream report of https://bugs.gentoo.org/show_bug.cgi?id=388853 I noticed that .desktop files for various common applications get installed into /usr/share/xfce4/helpers, but Chromium / Google Chrome is not on that list, which means users have to add it manually. Please consider adding .desktop files for Chromium (which Linux distros ship) and also Google Chrome (distributed by Google). The relevant commands would be: chromium-browser for Chromium google-chrome for Google Chrome If you need more info or explanation I'd be very happy to provide it.
Fixed in a8bd98b.
*** Bug 8620 has been marked as a duplicate of this bug. ***