In Page Designer when adding an action of Show Report and ReportShowInNewWindow is set to true, CRM just navigates to the report instead of opening in a new window.
This can be addressed by duplicating your browser tab in a new window before clicking the "view report" button.
Steps to Duplicate
1) Open CRM 2) Naviage to: Analysis > Constituent Reports > Constituent Profile > (any constituent) 3) Enter Design Mode 4) “Edit Action Groups” 5) Edit “More Information” 6) Click … next to Actions 7) +Add. 8) Settings: ActionType = Show Report, Report = any built-in report. ReportShowInNewWindow = True 9) Note that the History report opens in the same tab, not a new window, although “ReportShowInNewWindow” is set to true. This happens in IE and Chrome.