The percentage of Americans using Web browsers Mozilla and Firefox is on the up as Internet users turn away from Microsoft's Internet Explorer due to perceived risks with that application.

An online study found that use of the alternative browsers grew to 6 per cent in October from 5.2 per cent in September and 3.5 per cent in June, reports Active Network.

The 6 per cent was split evenly between the two browsers, both of which are funded by the Mozilla Foundation.

Microsoft's IE continues to be the market leader, but it has witnessed a dip of 0.8 per cent. IE claimed 95.5 per cent of users in June, 93.7 per cent in September, and 92.9 per cent last month.

The Opera browser and Apple Computer's Safari combined to reach just over 1 per cent of users.