These are the latest/last drivers for your computer...these are the only drivers you install > Legacy
I would use the 16.2.1
Make sure Win8.1 is fully updated from Windows Update before trying to install any AMD driver.
Here's how to install them >
Remove old drivers using 'uninstall a program' in the computer control panel****
Install new AMD drivers
Note: Disable all anti-virus/ anti-malware/ anti-anything while performing the installation. Very important.
Disabling hardware acceleration in any browser that has video playback issues is the correct thing to do. I do it by default in all my browsers.
I think it is a temporary bug of Firefox. But update your drivers is not a bad idea.You do not need to uninstall old driver. Installer will do it in a process of installation.
You may use any of those drivers.