So far this year, Google has spent nearly $50,000 on bug bounties.

Along with the security update, Google also upped Chrome's stable channel -- the browser comes in three editions, stable, beta and dev -- to version 10. The upgrade to Chrome 10 came less than five weeks after .

Chrome 10 includes a new JavaScript optimization technology, dubbed "Crankshaft," that boosts the browser's JavaScript rendering engine's speed in some benchmarks. Google debuted Crankshaft in the dev channel last December, and in the beta line last month.

According to Computerworld's tests, Crankshaft increases Chrome's score on Google's own V8 JavaScript benchmarks by 64%, but on the more widely used SunSpider test suite.

Other additions to Chrome 10 include site password synchronization, and the first appearance in a stable build of an anti-exploit "sandbox" to isolate the integrated copy of Adobe's Flash Player.