Safari 5 is an excellent web browser that you can make even better by installing Extensions to add more features. Safari 5 Extensions can display information in the toolbar such as the weather and news headlines, give you quick access to Twitter and FaceBook, help you shop on the Internet, and much more.
Check out Apple's Safari 5 Extensions Gallery (extensions.apple.com) to learn more about lots of Extensions you'll find useful. Some of the Extensions you'll see there: Twitter for Safari, Bing Highlights, NY Times Updates, Add to Amazon Wish List and Bing Highlights.
Some Extensions have options that you can change. On your Mac, select Preferences from the Safari Settings menu, and then click the Extensions icon.