Claude Finds Fatal Flaws in Firefox
You guys aren’t going to believe how fast AI is changing the world of cybersecurity. I just read about a massive partnership between Anthropic and Mozilla where Claude 4.6 was used to hunt down security flaws in the Firefox browser. - Claude discovered 22 unique vulnerabilities in just two weeks of testing. - Mozilla classified 14 of those as high severity issues. - Those 14 bugs accounted for nearly 20% of all high severity Firefox flaws found in 2025. - The AI scanned almost 6,000 files and even helped write the code to fix the problems. - It took only 20 minutes for the model to find its first major memory vulnerability. - Finding these bugs with AI was significantly cheaper and faster than trying to exploit them. This is a huge win for the good guys because it shows we can use automation to patch software before hackers even get a chance to look at it. Photo credit: anthropic.com Read more: https://www.anthropic.com/news/mozilla-firefox-security