Two weeks ago we announced that we had identified and fixed an unprecedented number of latent security bugs in Firefox with the help of Claude Mythos Preview and other AI models. In this post, we’ll go into more detail about how we approached this work, what we found, and advice for other projects on making good use of emerging capabilities to harden themselves against attack. Suddenly, the bugs are very good Just a few months ago, AI-generated security bug reports to open source projects were m...