Bugzilla is a bug tracking or defect tracking system that allows keeping track of outstanding bugs in a product. It tracks bugs and code changes, communicates with the teammates, submit and review patches and manage quality assurance (QA) of the product. Bugzilla is a tool that helps your team get organized and communicate effectively.

Unlike other commercial bug tracking software, Bugzilla is free and open source software; the source code is released under GNU General Public License. Despite being free Bugzilla offers extensive features that the other commercial bug tracking software lacks.

Bugzilla has optimized database structure for increased performance and scalability. It provides excellent security to protect confidentiality, advanced query tool to remember your searches, integrated e-mail capabilities, manageable user profiles and comprehensive e-mail preferences and complete permissions system.

Bugzilla is possibly used in systems administration, deployment management, chip design and development bug tracking, software and hardware bug tracking and IT support queues. Today, many companies find Bugzilla quite effective in reducing downtime, increasing productivity, raising customer satisfaction and improving communication. It can also reduce your cost by providing IT support accountability and telephone support knowledge bases.

Bugzilla is under very active development, which is supported by a dedicated team and constantly being tested by the Mozilla Foundation. The latest version of Bugzilla is 2.18.3, which has been released on 9th July 2005.