See this: https://support.mozilla.org/en-US/kb/upgrade-graphics-drivers-use-hardware-acceleration

Is it the web page content area that goes blank, or everything below the title bar?

Does this happen after running Firefox for a while? Sometimes a blacked content area can indicate extremely high memory usage, but you would notice Firefox starting to get sluggish first. You can confirm using the Windows Task Manager (Ctrl+Shift+Esc). It contains memory usage columns either on the Processes tab or the Details tab, and there's also a Resource Monitor you can launch to see how much memory applications are using.

Start Firefox in Safe Mode to check if one of the extensions (Firefox menu button/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem.

• Switch to the DEFAULT theme: Firefox menu button/Tools > Add-ons > Appearance
• Do NOT click the Reset button on the Safe Mode start window

• https://support.mozilla.org/kb/Safe+Mode
• https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes

Boot the computer in Windows Safe Mode with network support (press F8 on the boot screen) to see if that helps.

• http://www.bleepingcomputer.com/tutorials/how-to-start-windows-in-safe-mode/
• http://www.7tutorials.com/4-ways-boot-safe-mode-windows-10