To try the thousands of add-ons available here, download Mozilla Firefox, a fast, free way to surf the Web!
CloseWelcome to Firefox Add-ons.
Choose from thousands of extra features and styles to make Firefox your own.
CloseReview for Contacts Sidebar by jkbsy
Rated 5 out of 5 stars
The new pre-release is available for Thunderbird 5.0 :
http://extensions.sanjer.nl/index-site.php?page=tb_cs_prerelease
Thanks to Jeroen Peters !!!
French : http://infos-pro.bossy.fr/1/post/2011/07/contacts-sidebar-et-thunderbird-50.html
To create your own collections, you must have a Mozilla Add-ons account.