If you are having black screen for Firefox browser after upgrading to new version, you may need to upgrade you VGA driver.

Most likely, your graphic card is using Intel HD 2000/3000 or Intel HD 4000.

Open your Device Manager windows and click on Display adapters.

Right click on your graphic adapter and select properties. Then click on Driver tab.

 

Just click on "update Driver" button and windows will update your driver.