{...}: {
  xdg = {
    enable = true;
    mime.enable = true;
    mimeApps = {
      enable = true;
      defaultApplications = {
        "application/pdf" = "okularApplication_pdf.desktop";
        "x-scheme-handler/http" = "firefox.desktop";
        "x-scheme-handler/https" = "firefox.desktop";
        "x-scheme-handler/unknown" = "firefox.desktop";
        "x-scheme-handler/sgnl" = "signal-desktop.desktop";
        "x-scheme-handler/signalcaptcha" = "signal-desktop.desktop";
        "x-scheme-handler/element" = "element-desktop.desktop";
      };
    };
  };
}