Google Inc has rolled out a new version of its Chrome Web browser and a version of the Mac browser for mainstream users will be available within months, as the company moves to double Chrome's market share.

Almost exactly one year into Google's high-profile entry into the browser market dominated by Microsoft Corp, the Internet search giant is a distant No. 4, with a market share of roughly 2.8 percent.

For Google, Chrome is more than simply a browser, but part of a grand strategy to create a new Web-based operating system that could one day challenge Microsoft's control of the computer software market.

The Internet search company is readying a battery of updates, along with efforts to forge new distribution partnerships it hopes will soon make Chrome a much more significant player.

More: http://www.reuters.com/article/idUSTRE58E5KJ20090915