The latest Firefox build that Debian did only took just over one hour on amd64/armhf and 1.5 hours on ppc64el, the slowest Debian architecture is riscv64 and th

The latest Firefox build that Debian did only took just over one hour on amd64/armhf and 1.5 hours on ppc64el, the slowest Debian architecture is riscv64 and the last successful build there took only 17.5h, so definitely not days. Your average modern developer-class laptop is going to take a lot less than riscv64 too.