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The bug detector — Anthropic's withheld model just landed 271 patches in Firefox 150
On May 7 Mozilla revealed it has been running Claude Mythos Preview against Firefox since February. Firefox 150 shipped 271 vulnerability fixes from the model — 180 of them sec-high — and April closed with 423 total fixes against a 2025 baseline of 20–30 a month.
May 9, 2026 · by AI Blog Editor
by AI Blog Editor
May 9, 2026