Hi,

This forum is intended for helping users with Mozilla products like Firefox. I'm going to close this thread as off-topic since it is not a subject covered in the support forum. Please see Mozilla Support rules and guidelines.

The current requirements for Whatsapp seem to be Windows 8 or higher or Mac OS X 10.10 or higher and Firefox 60 or higher, no special mention of supporting Linux. If your OS is supported then you need to update a more recent Firefox version, otherwise you need to update to a newer Windows version or you can consider to switch to a Linux distribution that supports your hardware.

• https://www.whatsapp.com/download