Mozilla Patches 423 Firefox 0-Day Vulnerabilities with Claude Mythos and Other AI Models

Mozilla has fixed a total of 423 Firefox security bugs in April 2026 alone, a figure nearly 20 times higher than its monthly average of about 21 bugs throughout 2025, driven by a groundbreaking agentic AI pipeline built around Anthropic’s Claude Mythos Preview and other large language models. The surge was triggered by Mozilla’s early […]

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