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 mention of supporting Linux.
With Windows XP and Firefox 52 as the latest supported version you are out of luck.
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.
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 mention of supporting Linux.
With Windows XP and Firefox 52 as the latest supported version you are out of luck.
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
*https://web.whatsapp.com/
