It's a bit old but I'm reposting it anyway......

Today's browsers are sophisticated and highly functional programs -- but they can become so much more. Here are 46 great (and free) add-ons for Internet Explorer 7 and Firefox 2 that offer safer browsing, easier site-sharing, improved searching, faster news-gathering and more.

Plus, we offer tips to help you manage add-ons in both apps without bogging down your browser. To download any extension listed in this story, jump to "Add-Ons for Downloading." For many more add-ons, visit Add-Ons for Internet Explorer or FirefoxAdd-ons.

ComputerWorld