I'm shocked no one packaged Icecat after all these years. Icecat is absolutely a package to have in Debian, and it's more in line with DFSG than Firefox is. This is the browser Debian should have used all these years instead of Iceweasel. Icecat's additional features over Firefox are all opt-in, so anyone who don't want them will have no problem, and there is no telemetry enabled by default. It's also worth noting that adopting Icecat as the default browser in Debian would avoid any conflict with Mozilla in the future (although they appear to be solved now, no one can predict what will happen in the future) and will join the efforts of the GNU team with the Debian team for a better free browser that will get more attention in all the Debian-based distributions.