sudo apt install snapd-xdg-open
Reading package lists... Done
Building dependency tree       
Reading state information... Done
snapd-xdg-open is already the newest version (0.0.0~16.04).
The following packages were automatically installed and are no longer required:
  cairo-dock-data cairo-dock-plug-ins-data compiz-plugins libetpan17 libgldi3
  ubuntu-core-launcher
Use 'sudo apt autoremove' to remove them.
0 to upgrade, 0 to newly install, 0 to remove and 0 not to upgrade.