engine - 5:15 pm on Aug 6, 2013 (gmt 0)
Looks like the new options might be interesting in this release. There's a new options panel for Web Developer Toolbox.
This sounds interesting:
Mixed content blocking enabled to protects users from man-in-the-middle attacks and eavesdroppers on HTTPS pages
In developer toolbox:
New feature in toolbox: Network Monitor
Social share functionality