Tap the Firefox app icon, which resembles a blue globe with an orange fox wrapped around it. You cannot enable JavaScript in the Firefox mobile app, given that JavaScript is permanently enabled in Firefox. You can still enable cookies on Android, however. It's in the top-right corner of the screen. A drop-down menu will appear. This option is near the bottom of the drop-down menu. It's on the left side of the screen. This option is near the top of the page. Doing so will enable cookies for your Firefox browser.

TL;DR in Indonesian:
Buka aplikasi Firefox. Ketuk tombol ⋮. Ketuk Pengaturan (Settings). Ketuk Privasi (Privacy). Ketuk Kuki. Ketuk opsi Aktif (Enabled).