Please note that as of October 24, 2014, the Nokia Developer Wiki will no longer be accepting user contributions, including new entries, edits and comments, as we begin transitioning to our new home, in the Windows Phone Development Wiki. We plan to move over the majority of the existing entries. Thanks for all your past and future contributions.
Symbian Web Runtime File Format (.wgz)
WGZ files (files with the .wgz file extension) are installation files for Symbian Web Runtime applications - web apps that run on Symbian mobile devices.
MIME type for Symbian Web Runtime widget package is application/x-nokia-widget