ZCML File
configure.zcml

<configure
    xmlns="http://namespaces.zope.org/zope"
    xmlns:browser="http://namespaces.zope.org/browser"
    i18n_domain="zope"
    >
<include
    package="zope.session"
    />
<include
    file="browser.zcml"
    />
</configure>