Google is not the only browser maker releasing a minor update for its browser this week. Mozilla, which has recently refreshed both versions 3.5 and 3.0 is currently pushing an update to v3.5.4, which was offered at the end of the past month. Users of the latest stable version of Mozilla’s open source browser now have available for download Firefox 3.5.5. Version 3.0 of the browser was not updated this time around, although Mozilla traditionally offers 3.5.x and 3.0.x refreshes in tandem. The exception was generated by the introduction of v3.5.4 last week.

On October 27th, Mozilla made  Firefox 3.5.4 and Firefox 3.0.15 available and also stability and security updates for their respective versions. However, it appears that insufficient testing was carried out on 3.5.4. This made necessary the delivery of Firefox 3.5.5 at a little over a week, since the previous release of the open source browser hit the download tubes.

“As part of Mozilla's ongoing stability and security update process, Firefox 3.5.5 is now available for Windows, Mac, and Linux as a free download. We strongly recommend that all Firefox users upgrade to this latest release. If you already have Firefox 3.5, you will receive an automated update notification within 24 to 48 hours. This update can also be applied manually by selecting "Check for Updates..." from the Help menu,” explained Samuel Sidler, Quality Assurance engineer at Mozilla.

According to Mozilla, stability issues have been identified following the availability of Firefox 3.5.4. The company moved fast and had all fixes in place by Saturday of the past week, and moved to ship Firefox 3.5.4 on November 5th. Moving forward, Mozilla is planning to offer the next stability and security updates for supported versions of Firefox in mid-December 2009. Firefox 3.0.16 and Firefox 3.5.6 will be offered to customers the coming month.

Firefox 3.5.5 and Firefox 3.0.15 for Windows are available for download here.