Applications that are built on the Pega 7 Platform are cross-browser compatible because the rules that are used in the applications are HTML5 and CSS3 compliant. Applications that were developed in PRPC 6.x might have rules that contain custom HTML code that is not compliant with HTML5 and CSS3. Incompatible custom HTML code hinders the cross-browser compatibility of such applications.
Before you upgrade your PRPC 6.x applications, run the Deprecated HTML report to identify custom HTML code. Then, update the code to be compatible with HTML5 and CSS3.
Installation and User Guide