Hi Pankaj
Regarding your issue I came across one note which tells about browser supportability for WPC
Note # 1552754 - Browser support for Web Page Composer
It is recommended that Internet Explorer should be used for editing WPC resources and pages.
The reason being the design time of WPC is part of this Portal Administrator user interface technology, and according to SAP Product Availability Matrix (http://service.sap.com/pam),
the Portal Administrator user interface technology is supported for Internet Explorer only.
This includes all edit scenarios in WPC: editing resources, WPC pages, etc.
Though the End User part (runtime) has no such restriction.
Regards
Santarshi Samanta
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