Toshiba Z20 Win 10 Firefox redraw issue

TOSHIBA Z20t-B  P/N PT15BA-00500Y.
Windows 10.
Firefox falls apart when you restore the window.

https://support.mozilla.org/en-US/questions/1075688

After upgrading to Windows 10 the Firefox screen and tabs go blank after waking from sleep.
This is exactly the problem I have.

hi, this looks like an issue with hardware acceleration - please try updating your graphics driver, or in case this doesn't solve the issue or there is no new version available at the moment, disable hardware acceleration in the firefox menu ≡ > options > advanced > general (that setting will take a restart of the browser to take effect).

And that seems to have fixed it.

------------------------------
As FYI,
Device Manager>Display Adapters>Intel(R) HD Graphics 5300>Driver>
Version= 20.19.15.4331   18-11-2015 Intel Corporation.

On the Toshiba web site,
http://www.mytoshiba.com.au/support/computers/portege/z20t/pt15ba-00j00y/download?os=33

Intel Display Driver

Driver

10.18.15.4256

Windows 10 64-bit

179.7 MB

 On the Intel Web site, Driver is 15.40.10.4300 28-JAN-2016

Now how is the intel driver at 28-JAN2016 version 15 and the one in the computer at version 20?