Mozilla

New Capabilities

Published the study and shipped the protections in Firefox

Before its recent changes, Mozilla says about 75% of Firefox users could be singled out by fingerprinting scripts. After protections shipped in Firefox 143, that share fell to 46%, according to a study of nearly 25 million users published November 10.

Updated Yesterday

New Capabilities

Receiving and patching Firefox vulnerability reports

OpenAI's GPT-6 Cyber found 81 previously unknown high-severity flaws in Firefox, a critical flaw in the Brotli compression library, and working exploits for 948 Linux kernel vulnerabilities. OpenAI rated the model Critical under its Preparedness Framework, up from High for GPT-5.6 Cyber.

Updated 6 days ago

New Capabilities

Blocked affected certificates; shipped desktop and Android follow-ups

Eight intermediate certificates from eMudhra, an Indian certificate authority, had private keys a computer could guess in under a second. eMudhra first blamed an April 2025 key-generation ceremony, then acknowledged on October 26 that a script error produced the weak keys. Browsers and operating systems are now removing trust in the parent root, not just the eight certificates.

Updated Oct 30