Comment 7 for bug 1817903

Thanks for the attention to this:

DNS servers: 208.67.220.220 (opend dns) and 212.159.6.10 (recommended by isp)

typical sites: planthealth.co.uk, plus random others...
nslookup and dig ok
ping domain_name gives "Name or service not known"
ping ip ok
FF: Hmmm problem etc...

So this is my resolv.conf which is def linked to /run/resolvconf/resolv.conf rather than the systemd stub-resolv.conf:

# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
# DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
# 127.0.0.53 is the systemd-resolved stub resolver.
# run "systemd-resolve --status" to see details about the actual nameservers.

nameserver 192.168.2.1
nameserver 127.0.0.53
options edns0

I do have resolvconf installed (think I upgreded to Mint 19 from 18.3 so that explains it...)...
will remove and report back...