Originally posted on: http://geekswithblogs.net/Aligned/archive/2013/08/01/ie-11-updates-its-developers-tools.aspx

I installed the IE 11 preview for Windows 7 (I’m getting upgraded to Windows 8 at work next week). I’ve never been a fan of the IE 8 – 10 developer tools so I’ve mostly been using Chrome or Firefox’s Firebug. This revamp looks great and seems to work well. I think I’ll be spending more time in IE with the developer tools, once IE 11 is released.

“F12 Tools in Internet Explorer 11 Preview has been rebuilt from the ground up to give you:

• a new, cleaner user interface.
• new Responsiveness, Memory, and Emulation tools.
• new and improved functionality in familiar tools.
• an easier and faster workflow.”

http://msdn.microsoft.com/en-us/library/ie/bg182632(v=vs.85).aspx

http://ie.microsoft.com/testdrive/Browser/F12Adventure/ has a nice visual walk through of the new features.