I've outed myself as
Opera fan on this blog already, and I am very happy that
Opera version 9.5 has been released today. The browser has a new default design now (not my personal favourite) and a lot of new nice features, but the most interesting thing about this release is for web developers: Opera 9.5 includes a preview version of
Opera Dragonfly:
Open any website and click Tools -> Advanced -> Developer Tools, which starts up Dragonfly. It is a JavaScript Debugger, CSS and DOM inspector, and includes an Error Console which not only prints JavaScript but - very useful for me personally - also CSS errors. BTW; Dragonfly is open source and uses the BSD license. Looks like Opera will continue to be my favorite web development utility :)