lol

release-combined: readd firefox-esr test

It was added in PR #79786 (7a625e7) and then removed in commit 2de3caf
(apparently unintentionally as a rebase conflict).

_I think the ordering used by Eelco would sort the line this way._

+1
+1
nixos/release-combined.nix
··· 64 64 "nixos.tests.docker.x86_64-linux" 65 65 "nixos.tests.ecryptfs.x86_64-linux" 66 66 "nixos.tests.env.x86_64-linux" 67 + "nixos.tests.firefox-esr.x86_64-linux" 67 68 "nixos.tests.firefox.x86_64-linux" 68 69 "nixos.tests.firewall.x86_64-linux" 69 70 "nixos.tests.fontconfig-default-fonts.x86_64-linux"