Facebook is growing at a fast rate these days, with hundreds of new applications, scripts and Firefox add-ons driving that growth. We’ve picked out the leading browser extensions, desktop applications, Greasemonkey scripts and Facebook apps – more than 150 in all.

FIREFOX ADD-ONS

Firefox Toolbar – adds Facebook search and activity notifications to Firefox. Also view friends and share content without visiting Facebook itself.
Facebook HugBack – makes all our pokes display as “hugs” – only visible to you, not your friends.
Notre Dame Facebook Style – a custom “University of Notre Dame” style that adds a custom header and theme to all Facebook pages.
Facebook Photo Album Downloader – download entire albums from Facebook with a click.
Boost for Facebook – adds all kinds of Facebook-specific features to your browser, including skins, notifications, auto-poke, auto-login, friends in your sidebar and more.
Facebar – another Facebook toolbar with automatic login, search and quick links.
Firefox Universal Uploader – a tool to upload and download images to many online services, include Facebook.
Autoslideshow – grabs all the images from the current page and displays a slideshow of them within Firefox. Works with Facebook and lots of other photo sites.