: The stock "genuine" firmware provided by some ISPs (like Etisalat) often lacks a native option to use the router as a wireless extender/repeater.
Some users have archived specific "stock" and "Padavan" firmware versions for the models on Archive.org . OpenWrt Third-Party Firmware dir853 et a3 firmware update link
There is no universal link. Your link depends entirely on that tiny sticker on the back of your router. Trust the regional D-Link portal, avoid fake driver sites, and always use an Ethernet cable during the upgrade. : The stock "genuine" firmware provided by some