I am following the procedure outlined here at: https://support.mozilla.org/en-US/kb/install-firefox-linux#w_install-firefox-deb-package-for-debian-based-distributions-recommended I get this error when I run the gpg command 2:05:29:490 1>#8 [base 5/8] RUN gpg -n -q --import --import-options import-show /etc/apt/keyrings/packages.mozilla.org.asc | awk '/pub/{getline; gsub(/^ +| +$/,""); if($0 == "35BAA0B33E9EB396F59CA838C0BA5CE6DC6315A3") print "\nThe key fingerprint matches ("$0").\n"; else print "\nVerification failed: the fingerprint ("$0") does not match the expected one.\n"}' 22:05:29:567 1>#8 0.285 gpg: keyblock resource '/home/.gnupg/pubring.kbx': No such file or directory 22:05:29:567 1>#8 0.285 gpg: no valid OpenPGP data found. I am not familiar with Linux and I thought that following the instructions would work so I am asking for help. Here is the complete script. RUN wget -q https://packages.mozilla.org/apt/repo-signing-key.gpg -O- | tee /etc/apt/keyrings/packages.mozilla.org.asc > /dev/null RUN gpg -n -q --import --import-options import-show /etc/apt/keyrings/packages.mozilla.org.asc | awk '/pub/{getline; gsub(/^ +| +$/,""); if($0 == "35BAA0B33E9EB396F59CA838C0BA5CE6DC6315A3") print "\nThe key fingerprint matches ("$0").\n"; else print "\nVerification failed: the fingerprint ("$0") does not match the expected one.\n"}' RUN echo "deb [signed-by=/etc/apt/keyrings/packages.mozilla.org.asc] https://packages.mozilla.org/apt mozilla main" | tee -a /etc/apt/sources.list.d/mozilla.list > /dev/null RUN echo '\nPackage: *\nPin: origin packages.mozilla.org\nPin-Priority: 1000\n' | tee /etc/apt/preferences.d/mozilla RUN apt-get update && apt-get install firefox Thank you.