AI found 271 vulnerabilities in Mozilla Firefox

Mozilla browser developer reported the successful use of the latest Mythos neural network from the Anthropic company for a security audit. The tool managed to detect 271 vulnerabilities in the release version of Firefox 150, which sparked active discussions in the IT industry about a new era of automated bug finding.

What is the Anthropic Mythos: an overview of the new model

Mythos is a highly specialized artificial intelligence introduced by Anthropic in early April. Unlike universal chatbots, this model is aimed exclusively at finding critical vulnerabilities and 0-day bugs in software. Due to its potentially dangerous performance, access to the tool has only been granted to a limited number of verified partners, including the Mozilla team.

Specs and Comparison: Mythos vs Opus 4.6

The results of Mythos significantly exceed the capabilities of previous models. If the Anthropic Opus 4.6 model detected only 22 vulnerabilities when testing Firefox 148, the updated Mythos system in conjunction with Firefox 150 showed a twelvefold increase in performance. According to Mozilla representatives, the work of AI is now aligned with the efforts of elite groups of researchers in the field of cybersecurity.

Features of use in Firefox 150

Firefox CTO Bobby Holley emphasized that using Mythos has effectively replaced months of high-paying human labor spent searching for even one bug. Implementing AI analysis can become the new industry standard, especially for open source projects where security resources are often limited.

Browser Vulnerability Search Efficiency

Should such an AI analysis be implemented

For developers of complex software, the use of such models becomes a necessity. This allows you to find deeply hidden logic errors that elude traditional phasers and testers. The example of Firefox proves that neural networks are ready to become the main shield of protection in the digital space.