#nixos I need firefox to be version 129 or over  https://support.mozilla.org/bm/questions/1455729
to allow #amazonprime  to show movies on #firefox but the version of firefox did not update when I did 
sudo nix-channel --update
followed by
sudo nix-rebuild switch --upgrade
and rebooting
what am I doing wrong ? 

 Do you probably have the version of Firefox that comes with the NixOS. Install the one from packages.

https://search.nixos.org/packages?channel=24.05&show=firefox&from=0&size=50&sort=relevance&type=packages&query=firefox