Package: djview-plugin Version: 4.11-1 On the current debian 12 stable „bookworm“ with firefox-esr 115.9.1esr-1~deb12u1, we get $ sudo aptitude install djview-plugin The following NEW packages will be installed: djview-plugin iceweasel{a} Iceweasel 115.9.1esr-1~deb10u1 is a transitional package these days that pulls in firefox-esr. Is djview-plugin still functional with the relatively new firefox-esr, or does djview-plugin indeed require a browser from the times of the real iceweasel, before June 2016? In the first case, adapt the dependencies. In the second, remove the defunct djview-plugin from Debian.