devuan

$ apt policy firefox-esr
firefox-esr:
  Installed: 68.3.0esr-1~deb9u1
  Candidate: 68.3.0esr-1~deb9u1
  Version table:
*** 68.3.0esr-1~deb9u1 500
        500 http://deb.devuan.org/merged ascii-security/main amd64 Packages
        100 /var/lib/dpkg/status
     60.7.1esr-1~deb9u1 500
        500 http://deb.devuan.org/merged ascii-updates/main amd64 Packages
     60.6.3esr-1~deb9u1 500
        500 http://deb.devuan.org/merged ascii/main amd64 Packages
-------------------------------------

debian:

firefox-esr:
  Installed: 68.4.1esr-1~deb10u1
  Candidate: 68.4.1esr-1~deb10u1
  Version table:
*** 68.4.1esr-1~deb10u1 500
        500 http://deb.debian.org/debian-security stable/updates/main amd64 Packages
        100 /var/lib/dpkg/status
     68.2.0esr-1~deb10u1 500
        500 http://deb.debian.org/debian stable/main amd64 Packages