Firefox is a Mozilla search engine. I suppose "ubuntuzilla" refers to Mozilla apps for ubuntu based systems in Linux, if it's legit to begin with. I'm sure there's a way to get back home, though. Thanks for your interest, time and comments.
Thanks a lot, KGIII
#deb cdrom:[Linux Mint 19.1 _Tessa_ - Release amd64 20181217]/ bionic contrib main non-free
deb http://downloads.sourceforge.net/project/ubuntuzilla/mozilla/apt
all main
#deb cdrom:[Linux Mint 19.1 _Tessa_ - Release amd64 20181217]/ bionic contrib main non-free
deb...
I was updating Firefox for my Linux Mint 19.3 Tricia and something went wro
ng. Now I get the message:
E: Entrada 2 mal especificada en list fichero /etc/apt/sources.list (Suite)
E: No se ha podido bloquear el directorio de listas
Please help...I'm relatively new to Linux