Controls whether the browser will be allowed to display its popup menus or not.
First available in version 3.0 build 2039.
flag - If true, the browser will be able to display it's builtin popup menus. If false, attempts to open popup menus by right clicking, using Shift F10 etc. in the browser will fail. Valid values include: true and false.
No output parameters.
When this method is called synchronously, a return object containing the output parameters is returned to the caller immediately.