Unfortunately, Catalyst 15.9 were quickly pulled down due to a memory leak bug which caused all video memory to be used in several situations, including when an active browser windows is resized. Thankfully, AMD managed to quickly fix the problem and release the updated Catalyst 15.9.1 Beta drivers.
As it was the case with earlier Catalyst beta driver releases, this one is also available for Windows 10, Windows 8.1 and Windows 7 in both 32-bit and 64-bit version and is available at AMD's beta driver support page.