If you’ve noticed your older scripts or bypass methods failing, What was ViewerFrame Mode?

The "ViewerFrame Mode Refresh" Patch: What You Need to Know In the world of web security and browser-based exploits, things move fast. Recently, a specific technique known as the —often used by researchers and "script kiddies" alike to bypass certain security headers or refresh content in unauthorized ways—has been officially patched across major browser engines.

The browser may simply stop the frame from loading if it detects a ViewerFrame state change that violates security protocol. How to Move Forward