Firefox
FAQ
How do I get Firefox Quantum (57)?
When using NixOS 17.09, stable, nixos.firefox
currently gives version 56. Enabling unfree, and updating channels if required, allows the use of nixos.firefox-bin
which is packaged from Mozilla's upstream released binaries.
Using NixOS unstable, the Nix-built nixos.firefox
has been updated to 57.
Do note that Quantum is a marketing term, and as long as the version is greater than 57, the enhancements are in the Nix-built browser.