The new version of open-source browser Firefox has been delayed for a month.

Version 2.0, code named Bon Echo, had been due on September 26 but will now make its debut on October 24. The test schedule has also been adjusted, with the second beta now appearing a week late on August 23.

The delay has been put down to a small colony of bugs that still have to be ironed out, totalling 87, according to the project’s latest bug list. The new version will have a raft of new features to keep up with those coming in rivals Opera and Internet Explorer 7, including antiphishing security, a spell checker, integrated RSS news feed handling, and (once-again fashionable) tabbed browsing.

Apart from its growing popularity as a rival to Microsoft’s Explorer, Mozilla’s ability to get out bug-free software on time has the broader significance of being a status project for the world of open-source software. That is it suffering minor delays is embarrassing but not deeply so. Unlike Microsoft, Mozilla has to conduct its development cycle in the glare of public scrutiny.

Two weeks ago, it emerged that Firefox was being run through the "Vulnerability Discovery and Remediation, Open-Source Hardening Project", a bug and security hunting system co-developed by Coverity, that is supposed to reduce major security holes before public release