Simon Willison’s Weblog

YSlow. New extension for Firebug (yes, an extension on top of another extension) from the Yahoo! performance team which provides improved performance measurement tools and optimisation advice. 25th July 2007, 4:48 am

Introducing Operator. New microformat detecting Firefox extension, developed at IBM and released by Mozilla Labs. Examples are from Yahoo! Local, Upcoming and Flickr. 18th December 2006, 4:36 pm