{ ... }: { xdg.mimeApps = { enable = true; defaultApplications = { "default-web-browser" = [ "firefox.desktop" ]; "text/html" = [ "firefox.desktop" ]; "x-scheme-handler/http" = [ "firefox.desktop" ]; "x-scheme-handler/https" = [ "firefox.desktop" ]; "x-scheme-handler/about" = [ "firefox.desktop" ]; "x-scheme-handler/unknown" = [ "firefox.desktop" ]; "application/pdf" = [ "org.gnome.Evince.desktop" ]; "audio/wav" = [ "rhythmbox" ]; }; }; }