Claude AI Found 112 Bugs in Firefox: What It Reveals About AI-Powered Cybersecurity

Start Up No.2627: the phantoms of British AI “investment”, Bluesky CEO steps aside, Claude LLM finds Firefox bugs, and more

The A4 flyover at Brentford is more than 60 years old, and problems with it emerged almost immediately – and have only got worse since. CC-licensed photo by stevekeiretsu on Flickr. You can sign up to receive each day’s Start Up post by email. You’ll need to click a confirmation link, so no spam. A selection of 9 links for you. Overlooked. I’m @charlesarthur on Twitter. On Threads: charles_arthur. On Mastodon: https://newsie.social/@charlesarthu…

Claude AI Found 112 Bugs in Firefox: What it Reveals About AI-Powered Cybersecurity

Artificial intelligence is rapidly changing how cybersecurity vulnerabilities are discovered. A recent case involving the Firefox web browser illustrates just how dramatic that shift may be. Developers at Mozilla recently fixed over 100 bugs in the Firefox browser, including several security vulnerabilities that could potentially have been exploited by attackers. What makes the case notable is that the issues were discovered by Claude, an artifi…

Anthropic's Claude found 22 vulnerabilities in Firefox in two weeks

Anthropic, in collaboration with Mozilla, identified 22 security flaws in the Firefox browser during a two-week test, with 14 of the vulnerabilities classified as serious. The discoveries were made using the AI model Claude Opus 4.6. It began by analyzing the Firefox JavaScript engine and then moved on to other parts of the code base. In total, the model examined nearly 6,000 C files and generated 112 error reports. Most of the vulnerabilities h…