Adblock Plus – Adblock Plus is a popularly known addon on Firefox. It gets rid of most annoying banners, adverts and other popups by subscribing to a host. You can even block elements or add your own filter.
CustomizeGoogle – CustomizeGoogle allows you to enhance and customize Google’s search page by adding extra information (like links to Yahoo, Ask.com, MSN etc) and removing unwanted elements (like ads and spam). All features are optional and easily configured.
DownloadHelper – easily download streaming videos from websites such as Youtube in just one click away!
McAfee SiteAdvisor – Always stay protected with site rating on your status bar. When searching site ratings will appear next to each results. When surfing, site ratings appear on the task bar. So you’ll always know whenever you’re surfing a spyware website!
PDF Download – Easily download or convert page to PDF on any site.
Redirector – Easily redirect (change the path) unwanted site to a different site you want.
Stylish – Personalise the look of different sites with CSS. You can edit your own script and even searh other available scripts.
CS Lite – This is like NoScript, but applies for cookies. Wipe away unwanted cookies and choose to allow only on trusted sites.
Tabmix Plus – Enhance the way you browse using tabs. Creating a whole new way of browsing. It includes such features as duplicating tabs, controlling tab focus, tab clicking options, undo closed tabs and windows, plus much more. It also includes a full-featured session manager.
Fireuploader – Upload media through this application to popularly known websites such as Flickr, Youtube, Facebook, etc.
Foxmarks – Sinchronises your bookmark and store them into a server. More like a bookmark backup tool. Allows you to recover your bookmarks on any machine.