BFA Best of Firefox Addon Collection of xmarks, adblock, Hide Caption, Download Statusbar, DownThemAll, FoxyTunes, NoScript, Tab Mix....So on Full list and suggestions http://UbuntuGIDE.wordpress.com
You can capture your screen and record your voice to make screencasts (tutorials, e-lessons, etc.).
Ever wanted to know what was behind the link before you clicked? Interclue tells you everything you need to know before you open yet another tab.
ScribeFire Classic is a blog editor that integrates with Firefox and lets you easily post to your blog.
ScribeFire Classic is no longer supported; you should install ScribeFire Next: https://addons.mozilla.org/en-US/firefox/addon/scribefire-next
An extension to hide the caption of Firefox, displays Minimize, Maximize/Restore and Close buttons on the menubar/nav-bar, and includes "Tiny Menu" function. This extension also provides "Bookmarks" and "Histroys" buttons with popup menu.
Instant Search for Firefox. Preview Google and Yahoo search results and suggestions in your Locationbar and Searchbar.