
Mozilla's AI agents fix 423 Firefox security bugs in one month
Mozilla used AI agents to help fix 423 Firefox security bugs in April 2026, much more than their usual monthly number. These agents work by finding risky code, trying to cause crashes, and making sure the problems can be repeated before sending reports to human reviewers. Many old and serious issues were found, including bugs that had been in the browser for years. Some experts say that while the fixes may lower risk for users, there might still be some logic errors that tests miss, and the same AI methods could possibly help attackers find new bugs. Mozilla spread the fixes over several browser versions to watch for problems and fix conflicts.













