โ† Back to topics
3 tool-launch Mozilla single-source 1 article

Quoting Bobby Holley

Mozilla used an early version of Claude Mythos Preview to identify 271 vulnerabilities fixed in Firefox 150.

๐Ÿ” Let's dive in

Mozilla collaborated with Anthropic to apply an early version of Claude Mythos Preview to Firefox security evaluation. The effort identified 271 vulnerabilities that were fixed in this week's Firefox 150 release. Firefox CTO Bobby Holley praised the team's work and expressed optimism about AI-assisted security defense.

Lead coverage: Simon Willison โ€” Quoting Bobby Holley โ†—

๐Ÿ•ฐ The timeline ยท 1 source

Simon Willison analyst ยท 5h ago ยท 3/5

Quoting Bobby Holley โ†—

Mozilla collaborated with Anthropic to apply an early version of Claude Mythos Preview to Firefox security evaluation. The effort identified 271 vulnerabilities that were fixed in this week's Firefox 150 release. Firefox CTO Bobby Holley praised the team's work and expressed optimism about AI-assisted security defense.

Defenders finally have a chance to win, decisively.
โ€” Bobby Holley
You may need to reprioritize everything else to bring relentless and single-minded focus to the task, but there is light at the end of the tunnel.
โ€” Bobby Holley

๐Ÿท Tags

software-development Claude

๐Ÿ”ง Debug

Cluster ID
2c2bfbd5de
Importance (max)
3
Members
1
Sources
Simon Willison
Earliest
2026-04-22T05:40:56.000Z
Latest
2026-04-22T05:40:56.000Z
Lead URL
https://simonwillison.net/2026/Apr/22/bobby-holley