{{ prefetch }} {{ favico }} {{ browser_specific_head }} {# Use the latest engine in ie8/ie9 or use google chrome engine if available #} {# Improve usability in portal devices #} {{ css_file_to_string }} {{ css_style_print }} {{ js_file_to_string }} {{ extra_headers }} {# Extra header configured in admin section, only shown to non-admins #} {{ header_extra_content }}