FireFox ToolBars add extra functions to FireFox such as search engines and server based bookmarks and history.
Amazon A9 Toolbar (Login required)
http://static.a9.com/-/static/images/logo-a9.gifhttp://toolbar.a9.com/
Features : Search & server based bookmarks & history !
Clusty Toolbar
http://clusty.com/images/toolbars-header.pnghttp://clusty.com/toolbar
Features : Search !
Yahoo Toolbar (Login required)
http://us.i1.yimg.com/us.yimg.com/i/tb/download/sp_fx_2.gifhttp://uk.toolbar.yahoo.com/
Features : Search, server based bookmarks & email !
REFERRERS
FireFox
ToDo