Preparing to unpack .../000-dkms_3.0.6-2ubuntu2_all.deb ...
Unpacking dkms (3.0.6-2ubuntu2) over (2.8.7-2ubuntu2.1) ...
dpkg: warning: unable to delete old directory '/etc/dkms/template-dkms-mkdeb/debian': Directory not empty
dpkg: warning: unable to delete old directory '/etc/dkms/template-dkms-mkdeb': Directory not empty
dpkg: warning: unable to delete old directory '/etc/dkms/template-dkms-mkbmdeb/debian': Directory not empty
dpkg: warning: unable to delete old directory '/etc/dkms/template-dkms-mkbmdeb': Directory not empty
Selecting previously unselected package dh-dkms.
Preparing to unpack .../001-dh-dkms_3.0.6-2ubuntu2_all.deb ...
Unpacking dh-dkms (3.0.6-2ubuntu2) ...
Selecting previously unselected package firefox.
Preparing to unpack .../002-firefox_1%3a1snap1-0ubuntu2_amd64.deb ...
=> Installing the firefox snap
==> Checking connectivity with the snap store
==> Installing the firefox snap
error: cannot perform the following tasks:
- Fetch and check assertions for snap "firefox" (2605) (persistent network error: Get https://api.snapcraft.io/v2/assertions/snap-revision/MuzqH2jNR311JYXIvH4uHVwpYz3_0MIVSOOSNdd-QkwMWM5bCnDA_W7W-27O_RF7?max-format=0: dial tcp: lookup api.snapcraft.io: Temporary failure in name resolution)
dpkg: error processing archive /tmp/apt-dpkg-install-j6WDaA/002-firefox_1%3a1snap1-0ubuntu2_amd64.deb (--unpack):
 new firefox package pre-installation script subprocess returned error exit status 1