Google launched Chrome 24 with a bevy of security fixes, an update for Flash, support fro MathML and more speed.
The details on Chrome's release page features "security fixes and rewards." There's a good bit of the former.
Google's overview features the full list of fixes.
On the feature side of the Chrome equation, Google added support for MathML, a markup language used for HTML documents to make math content visual. MathML is supported in Firefox and Safari too.