Really like the new Firefox Web Developer Tools Interface

Firefox fast release cycle is something that you start by hating but then come to love (Even more that they are now adding long term support). The latest Firefox 10 release updated the Web Developer Tools and it is now a really cool way to inspect the pages your visiting (or developing). Also, Mozilla introduced a new JS scratchpad that is great for running JS code. I imagine it to very usefull when doing online d3.js development! Yeay!