Blend4Web Team writes:
We are happy to announce the new Blend4Web release! This time we added a lot of CPU-side optimizations, and some scenes started working 50% faster! Also this release contains an awesome feature - Blender Internal's Tangent Shading! From now on, working on polished metal or beautiful hair will become a lot more interesting and faster.
Also we'd like to mention new functions of Normal Editor - the tool that became pretty popular even among Blender-headed people who don't work with Web.
And, as always, there's more to mention and to describe - you can read about it in our Release article!
The Normal editing features alone are worth it. This add-in is something that should be in the arsenal of everyone who designs game content.