1. 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. Watch a quick overview.
Xmarks is the #1 bookmarking add-on. Install it on all your computers to keep your bookmarks and (optionally) passwords backed up and synchronized. Xmarks also helps you uncover the best of the web based on what millions of people are bookmarking.
The Cooliris 3D Wall — Simply the fastest and most stunning way to browse photos and videos from the Web or your desktop. Effortlessly scroll an infinite “3D Wall” of your content from Facebook, Google Images, YouTube, Flickr, and hundreds more.
4. Video DownloadHelper
This is a tool for web content extraction. Its purpose is to capture video and image files from many sites.Just surf the Web as you are used to, when DownloadHelper detects it can do something for you, the icon gets animated and a menu allows you to download files by simply clicking an item. For instance, if you go to a YouTube page, you’ll be able to download the video directly on your file system. It also works with MySpace, Google videos, DailyMotion, Porkolt, iFilm, DreamHost and others.
All your social networks and instant messaging in one easy to use browser sidebar. Get all your friend updates, update your status and share stuff easily across Facebook, MySpace, Twitter, and more – all at once! Simplify your online social life.
Shareaholic is a lightweight and easy to use add-on for Firefox with a minimal browser footprint. Shareaholic makes it very simple to quickly, and very easily share, bookmark, and e-mail any web page via a wide array of your favorite web 2.0 social networking, bookmarking, blogging, and e-mail services.
WOT, Web of Trust, warns you about risky websites that try to scam visitors, deliver malware or send spam. Protect your computer against online threats by using WOT as your front-line layer of protection when browsing or searching in unfamiliar territory.
TwitterBar allows you to post to Twitter from Firefox’s address bar. A small Twitter icon sits to the right of your address bar; clicking on it will post your tweet, and you can hover your mouse over it to see how many characters you have left.
Fire.fm gives you access to the extensive music library on Last.fm. Last.fm gives free radio to the US, UK, and Germany, plus subscriber-based service to the rest of the world. Listen to your favorite music and discover new artists in the process.
10. WebMail Notifier
WebMail Notifier checks your webmail accounts and notifies the number of unread emails. Supports: gmail, yahoo, hotmail, daum, naver, empas, nate and more.