A Firefox3 implementation of Microsoft Webslices. It allows you to ‘follow’ an area of a web page through a dedicated feed bookmarked in a new toolbar. Clicking on the toolbar entry shows the information related to your choice in a popup, without the need to open a complete web page. With the help of a Greasemonkey script (not mandatory but helpful) you can insert webchunks/webslices markup into any web page so the Webchunks extension handles it.