{
  pkgs,
  username,
  ...
}:
{
  programs.firefox = {
    enable = true;
    package = pkgs.firefox;

    policies = {
      # Updates & Background Services
      AppAutoUpdate = false;
      BackgroundAppUpdate = false;

      # Quality of Life
      OfferToSaveLogins = false;

      # Extensions
      ExtensionSettings = let
        moz = short: "https://addons.mozilla.org/firefox/downloads/latest/${short}/latest.xpi";
      in {
        "*".installation_mode = "blocked";

        # uBlock Origin
        "uBlock0@raymondhill.net" = {
          install_url = moz "ublock-origin";
          installation_mode = "force_installed";
          updates_disabled = true;
          private_browsing = true;
          default_area = "navbar";
        };

        # Bitwarden
        "{446900e4-71c2-419f-a6a7-df9c091e268b}" = {
          install_url = moz "bitwarden-password-manager";
          installation_mode = "force_installed";
          updates_disabled = true;
          private_browsing = true;
          default_area = "navbar";
        };

        # Dark Reader
        "addon@darkreader.org" = {
          install_url = moz "darkreader";
          installation_mode = "force_installed";
          updates_disabled = true;
          private_browsing = true;
          default_area = "navbar";
        };

        # SponsorBlock
        "sponsorBlocker@ajay.app" = {
          install_url = moz "sponsorblock";
          installation_mode = "force_installed";
          updates_disabled = true;
          private_browsing = true;
          default_area = "menupanel";
        };

        # Return YouTube Dislike
        "{762f9885-5a13-4abd-9c77-433dcd38b8fd}" = {
          install_url = moz "return-youtube-dislikes";
          installation_mode = "force_installed";
          updates_disabled = true;
          private_browsing = true;
          default_area = "menupanel";
        };

        # RES
        "jid1-xUfzOsOFlzSOXg@jetpack" = {
          install_url = moz "reddit-enhancement-suite";
          installation_mode = "force_installed";
          updates_disabled = true;
          private_browsing = true;
          default_area = "menupanel";
        };
      };

      "3rdparty".Extensions = {
        "{446900e4-71c2-419f-a6a7-df9c091e268b}" = {
          environment = {
            base = "https://bitwarden.joshuayuen.me";
          };
        };
      };

      profiles = {
        ${username} = {
          id = 0;
          isDefault = true;
          name = "${username}";
        };
      };
    };
  };
}