Glue - Recommendations for Books/Movies/Music
GetGlue helps you find your next favorite movie, book, or music album. As you visit sites like Amazon, IMDB, and Wikipedia, GetGlue suggest things you'll like.
Delicious Bookmarks
Delicious Bookmarks is the official Firefox add-on for Delicious, the world's leading social bookmarking service (formerly del.icio.us). It integrates your bookmarks and tags with Firefox and keeps them in sync for easy, convenient access.
YSlow
YSlow analyzes web pages and suggests ways to improve their performance based on a set of rules for high performance web pages.http://yslow.org is the official open source website.
Pocket (formerly Read It Later)
When you find something on the web that you want to view later, put it in Pocket. It automatically syncs to your phone, tablet or computer so you can view it at any time, even without an internet connection.
Xmarks Sync
Xmarks is the #1 bookmarking and open tab add-on. Keep your bookmarks, and open tabs backed up and synchronized across computers and browsers. Mobile phones with Premium access. Utilize LastPass to sync passwords!
ImTranslator - Online Translator, Dictionary, TTS
ImTranslator provides access to the online translation powered by Google Translate, Microsoft, Babylon for 66 languages. It includes dictionary, text-to-speech, back translation. Complete Video Tutorial: http://youtu.be/UwK6529XZIQ
Greasemonkey
Customize the way a web page displays or behaves, by using small bits of JavaScript.
Firebug
Firebug integrates with Firefox to put a wealth of development tools at your fingertips while you browse. You can edit, debug, and monitor CSS, HTML, and JavaScript live in any web page...
Adblock Plus
Annoyed by adverts? Troubled by tracking? Bothered by banners? Install Adblock Plus now to regain control of the internet and change the way that you view the web.A short video overview is available at http://www.youtube.com/watch?v=oNvb2SjVjjI