This means that users of 15-inch MacBook Pro laptops with Retina displays will be able to view webpages at a 2880-by-1800 resolution with Chrome 21.
In mid-June, Google said in a blog post that the Chrome development team was "off to the races" in enhancing the browser so that it could take advantage of ultra high-resolution Retina screens.
Chrome 21, which runs on the Mac OS, Windows and Linux OSes for laptops and desktops, also features a new API (application programming interface) called getUserMedia that lets users give Web applications access to their computers' cameras and microphones without having to install a plug-in.
With this WebRTC API, applications can do things like take photos of users, as the experimental Sketchbots app in the Chrome Web Lab does. After it takes a picture of the user's face, Sketchbots turns it into a line drawing and ships it to a robot in the Science Museum of London.
"The robot then draws out your portrait in a patch of sand, which you can watch live on YouTube and visitors can watch in person at the museum," wrote Shijing Xian, a Google software engineer in the blog post.
The new version also fixes a variety of bugs and security vulnerabilities, including several rated "high," including one described as a buffer overflow in the WebP decoder and another labeled integer overflows in the PDF viewer.
Juan Carlos Perez covers enterprise communication/collaboration suites, operating systems, browsers and general technology breaking news for The IDG News Service. Follow Juan on Twitter at @JuanCPerezIDG.