profiles/disableStudies.nix


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{ config, lib, ... }: with lib; {
  options.features.disableStudies = mkOption {
    type = types.bool;
    default = false;
    description = ''
      Firefox Shield Studies are meant to allow Mozilla to perform A/B testing
      on Firefox users.
      Studies have been used in the past to introduce surprising behaviour [1],
      and we may want to prevent that from happening to our users.

      [1]: https://blog.mozilla.org/firefox/update-looking-glass-add/
      https://mozilla.github.io/normandy/user/end_user_interaction.html#opt-out-preference
    '';
  };

  config = mkIf config.features.disableStudies {
    policies = {
      DisableFirefoxStudies = true;
    };

    preferences = {
      app.shield.optoutstudies.enabled = false;
    };
  };
}