So long, Cluster Tabs Rated 1 out of 5 stars

http://twitter.com/AddonExchange/statuses/52409736812965888

Sad day all. Clusters is finished due to Firefox 4. There will be no support for Clusters and URLs are irretrievable. Use www.gobox.com 1:40 PM Mar 28th via web

Unbelievable. The annoying thing is that is not possible to recover the Clusters and URLs.