new toys for web-developers…
- XRAY is a point-and-click tool that exposes CSS-attributes, inheritance-hierarchy and screen-dimensions of any DOM-element. since XRAY is a bookmarklet, it works not only with Firefox but Safari/Webkit as well.

- Yahoo’s YSlow is a plugin for popular Firefox-extension Firebug. YSlow analyzes a webpage’s performance and assigns grades (A-F) regarding number of HTTP-requests, use of expire-headers, use of gzip-compression, DNS lookups, javascript/css-bloat etc. linked sections from Y!’s developer network explain how to improve the various benchmarks. highly recommend!
