No specific info about version 16.4. Please visit the main page of Safari Technology Preview on Mac Informer.
Safari Prairiefire helps retire old/expired bookmarks from within Safari.
This Mac application is a cookie manager for Safari.
Easily access hidden preferences for Safari 4 Beta.
Provides options to clear cookies, cache, history, top sites, saved state.
Guide your visitors past crazy monkeys, rebellious rhinos and hilarious hippos...