Netgear C6300BD Firmware

I have recently experienced slow connection speeds and lackluster Wi-Fi coverage/range around my house.  I wonder if a firmware upgrade would solve these issues.  I saw on Netgear's website that the latest firmware for Cox is V2.01.18:

https://kb.netgear.com/000036375/What-s-the-latest-firmware-version-of-my-NETGEAR-cable-modem-or-modem-router

My router is running V2.01.08.  I understand that I cannot download the updated firmware directly or through the Netgear Genie app, and that Cox has to provide the update to me.