Prepare for Critical Update: Clickjack Protection for Legacy Browsers for Visualforce Pages Without Page Header
In about a weeks time, a Critical Update called Clickjack Protection for Legacy Browsers for Visualforce Pages Without Page Header (Critical Update) will come into effect. This CU extends clickjack protection for legacy version browsers for Visualforce pages that set showHeader=”false” when those pages are configured on API versions older than 27.0. Clickjack protection is added to VF pages through several security