Fix build

Dockerfile

@@ -374,8 +374,6 @@ Pin-Priority: 1000" > /etc/apt/preferences.d/mozilla && \
         libreoffice-plasma \
         libreoffice-style-breeze && \
     rm -rf /var/lib/apt/lists/* && \
-    # Ensure Firefox is the default web browser
-    update-alternatives --set x-www-browser /usr/bin/firefox && \
     # Fix KDE startup permissions issues in containers
     MULTI_ARCH=$(dpkg --print-architecture | sed -e 's/arm64/aarch64-linux-gnu/' -e 's/armhf/arm-linux-gnueabihf/' -e 's/riscv64/riscv64-linux-gnu/' -e 's/ppc64el/powerpc64le-linux-gnu/' -e 's/s390x/s390x-linux-gnu/' -e 's/i.*86/i386-linux-gnu/' -e 's/amd64/x86_64-linux-gnu/' -e 's/unknown/x86_64-linux-gnu/') && \
     cp -f /usr/lib/${MULTI_ARCH}/libexec/kf5/start_kdeinit /tmp/ && \