These are the Addons that i always use with Firefox.
· Bookmark Sync and Sort is a Mozilla Firefox extension that lets you connect to an FTP/WebDAV server and synchronize your bookmarks that are stored in an XML file.

· IE View Lite is a cut down version of IE View by Paul Roub, which is 47.4 KB. All the same UI and features are there. It has a right click menu item to open a page in IE and a list of sites to always open in IE. It can close tabs automatically and send additional parameters to the executable. Everything's just been rebuilt from the ground up to be smaller and more efficient.

· FireFTP is a free, secure, cross-platform FTP client for Mozilla Firefox which provides easy and intuitive access to FTP servers.

· ChatZilla. A clean, easy to use and highly extensible Internet Relay Chat (IRC) client.

· Adblock Plus. Ever been annoyed by all those ads and banners on the internet that often take longer to download than everything else on the page? Install Adblock Plus now and get rid of them. Right-click on a banner and choose "Adblock" from the context menu - the banner won't be downloaded again. Or click Adblock Plus icon in the toolbar to see all elements of the page and block the banners. You can use filters with wildcards or even regular expressions to block complete banner factories.

· Adblock Plus: Element Hiding Helper. Fight the text ads! Element Hiding Helper is a companion extension for Adblock Plus meant to make creating element hiding rules easier.

· Adblock Plus Filter Uploader. Uploads the filters from your Adblock Plus installation to a FTP server.

Simply cant live without em' :o)