UserAgent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.116 Safari/537.36

Steps to reproduce the problem:
1. Navigate to 2 successive pages
2. Press Backspace
3. Follow onscreen prompt (Alt + Backspace)

What is the expected behavior?
Browser will return to previous page

What went wrong?
No response from browser

Did this work before? Yes Wednesday

Chrome version: 52.0.2743.116  Channel: stable
OS Version: 6.1 (Windows 7, Windows Server 2008 R2)
Flash Version: Shockwave Flash 22.0 r0

Critical loss of functionality