Microsoft's Internet Explorer remains out in front with a share of 40.6 per cent, but it's expected that Chrome will continue to close the gap.
"We can look forward to a fascinating battle between Microsoft and Google as the pace of growth of Chrome suggests that it will become a real rival to Internet Explorer globally," said Aodhan Cullen, chief executive of StatCounter.
"Our stats measure actual browser usage, not downloads, so while Chrome has been highly effective in ensuring downloads our stats show that people are actually using it to access the web also."
Chrome became the number two browser in Britain in August, although it has a larger gap to close on Internet Explorer than the global average. Some 42.8 per cent of Britons online currently use Microsoft's browser, according to StatCounter, compared to 45 per cent in August.
In the United States Microsoft's share is even greater, at 50.7 per cent, and Chrome, on 17.3 per cent, is yet to overtake Firefox on 20.1 per cent.
Google entered the browser wars relatively late, in December 2008, but Chrome quickly became a strong contender thanks in part to promotion on the Google search home page, as well as TV and billboard advertising. It claims the speed of its software as a major advantage over rivals.
All the browser developers are now focused on adding HTML5 compatibility to their browsers. The new web standard offers new ways to include video and interactive elements in pages and is expected to prompt major changes in how many websites operate.