Helper script to override Firefox's attempt to open .cbz files as Zip files, regardless of OS file associations

gistfile1.txt

#!/bin/sh
# NOTE: Despite this script using KDE commands like ark and kdialog, Firefox
#       doesn't obey KDE's file associations, so you'll need to use a non-KDE
#       file manager like PCManFM to edit the file associations.

open_zip() {
    exec ark "$@"
}

offer_comix() {
    if kdialog --yesno 'File appears to be a Comic Book Archive\nOpen in Comix instead?'; then
        exec comix "$@"
    else
        open_zip "$@"
    fi
}

case "$1" in
    (*.[cC][bB][zZ]) offer_comix "$@";;
    *) open_zip "$@";;
esac