The open-source Mozilla Foundation has issued release candidate 1 of a major upgrade to its Firefox browser.
Version 1.5 of Firefox represents a significant jump from the current version, 1.0.7, offering improved pop-up blocking, better user navigation and enhanced support for web standards.
The 1.5 release candidate will be followed by a final version of the browser that will be distributed to internet users before the year is out.
Another preview of the code is expected later this month before commercial release.
Version 1.5 will include an improved software updating system to deal with security updates and product enhancements, and will offer better integration with the Apple Mac operating system.
Firefox has so far been downloaded over 100 million times since its launch in November 2004, and has around 8% of the browser market. Microsoft’s Internet Explorer has around 85% of the market.