Firefox Browser — Cyber Threats, Attacks & Incidents

Threat entity extracted from intelligence sources

Frequency
2
occurrences
First Seen
March 6, 2026
Last Seen
April 21, 2026

Related Threat Clusters

Recent Intelligence Reports

  • Mozilla says it patched 271 Firefox vulnerabilities thanks to Anthropic's Claude Mythos — Engadget · April 21, 2026
  • Anthropic's AI Hacked the Firefox Browser. It Found a Lot of Bugs. — Wsj · March 6, 2026

CVSS v3.1 Breakdown