Today we introduce Synchronicity , a Firefox extension that supports the user in rediscovering missing web pages. It triggers on the occurrence of 404 "Page not Found" errors, provides archived copies of the missing page as well as five methods to query search engines for the new location of the page (in case it has moved) or to obtain a good enough replacement page (in case the page is really gone). Synchronicity works in real time and helps to overcome the detriment of link rot in the web. Installation: Download the add-on from https://addons.mozilla.org/en-US/firefox/addon/synchronicity and follow the installation instructions. After restarting Firefox you will notice Synchronicity's shrimp icon in the right corner of the status bar. Usage: Whenever a 404 "Page not Found" error occurs the little icon will change colors and turn to notify the user that it has caught the error. Just click once on the red icon and the Synchronicity panel will load up. Synchroni...
