Primary user interface

[1]

Primary User Interface denotes the portions of a Web user agent's user interface that are available to users without being solicited by a user interaction.

Web Security Context: User Interface Guidelines (2010-08-04 20:09:50 +09:00 版) <http://www.w3.org/TR/2010/REC-wsc-ui-20100812/#def-primary-chrome>