Updating your router’s firmware is a good fix for slow internet speeds. To update the Arris router firmware, download the firmware for your model from Arris support website. Let’s take a look at the process of how to update firmware on Arris router. It is a fairly simple process that can be carried out on your own without the assistance of a technician. How to install Arris firmware update?  Log in to your router and type ‘192.168.0.1’ in a web browser.  Find out the firmware version of your router.  Check for the latest firmware update compatible to your device and download it.  After you upload the file, the installation will continue automatically.