Overview
- A new AI settings area adds a global block that is enabled by default and per-feature states for availability, opt‑in enablement, or full blocking with local data deletion for on‑device models.
- The controls cover translations, automatic image descriptions, link previews and sidebar chatbots from providers including Anthropic Claude, ChatGPT, Microsoft Copilot, Google Gemini and Le Chat Mistral.
- Mozilla reports fixing more than 50 vulnerabilities, many rated high risk, including sandbox escapes and multiple JavaScript use‑after‑free bugs, with no active exploitation known at release.
- Developers gain WebGPU support in Service Workers plus Trusted Types and the Sanitizer API for XSS defenses, alongside new JavaScript iterator methods and CSS enhancements for anchor positioning and shapes.
- Remote configuration updates are now decoupled from telemetry, Windows 10 backups work even with history‑on‑close enabled, and coordinated updates ship for ESR builds, Thunderbird and the Tor Browser based on ESR 140.8.