Google has launched a new version of its Chrome web browser, which includes 50 security fixes. Chrome has more than 750 million active users worldwide and rivals Internet Explorer as the world's most popular web browser.

The new Chrome version 30 for Windows, Mac, Linux and Chrome Frame contains several enhancements, including easier searching by image, new applications and extension APIs, and improvements to its stability and performance.

The security fixes include some 15 patches that Google rates as ‘high' or ‘medium' level severity. Google pays outside developers who spot and fix such bugs under its ‘vulnerability reward programme'.

The company paid more than $25,000 (£15,000) in rewards to overhaul the latest version of Chrome and has made hundreds of reward payments during the product's lifetime, ranging in value from $500 to more than $30,000 (£300 to £18,000).

The problems fixed in the current version include various ‘use-after-free' errors which could cause the browser to crash, and ‘address bar spoofing' malware which installs a fake address bar and forces the browser to display web pages chosen by the attacker.

Google Chrome is an open-source browser that was first launched in September 2008.