When my resolv.conf contains domain mydom.local search mydom.local nameserver 192.168.1.18 nameserver 192.168.2.10 I encounter that I cannot access s1.mydom.local in firefox. However, I can access it in safari, chrome, via ssh, it responds to ping etc. On firefox says the server cannot be found. If i enter the server IP address, it works. So I go to about:networking#dns and see that DNS suffix is set to mydom.local attlocal.net I go to DNS search and enter s1.mydom.local to get NS_ERROR_UNKNOWN_HOST. Then i enter only s1 and it spits out the correct IP address. And from there on, if I put into the address bar only https://s1 then it works. It seems like a bug that when I enter s1.mydom.local firefox for some weird reason might be resolving s1.mydom.local.mydom.local which i just wrong. Is this a bug? No other browsers behave like this. Is there a workaround?