Google Buzz Checker : This extension helps to check the unread count for Google Buzz messages and when you click the icon it will redirect you to the Google Buzz page.
Download Google Buzz Checker
Google Buzz Extension for Firefox Browser
Buzz it : This will help you to update your Google Buzz status via Gmail with the link and the title of the webpage you are viewing. After installation, go to VIEW>TOOLBARS>CUSTOMIZE and drag the “Buzz It!” button to your main toolbar. It will also shorten URLs with Bit.ly, allowing the user to monitor their link statistics. Your status update from the extension will look like the below image.
Download Buzz it
Hope you find the above extensions useful to make your Google Buzz experience more comfortable and handy. If you know any other extension other than above, do share with us in the comments.