One model finds a fifth of a year's Firefox high-severity bugs in two weeks

Claim

Opus 4.6 discovered 22 high-severity Firefox vulnerabilities in two weeks, approaching a fifth of all high-severity Firefox bugs fixed in 2025.

Reported metric: 22 in 2 weeks

Reporting date: 2026-03-08 (not necessarily the event date)

Sources

Attribution and reporting linked by this record; links do not imply independent verification.

• Welcome to March 8, 2026 (theinnermostloop.substack.com)