This is the current unstable branch and the information in this section is therefore not final.

The state version in this release includes the changes below. These changes are only active if the home.stateVersion option is set to "19.09" or later. The programs.firefox.package option now expects a wrapped Firefox package and defaults to pkgs.firefox. The options home.keyboard.layout and home.keyboard.variant now default to null, which indicates that the system value should be used.