Mozilla rolled out Firefox 151 for mobile, adding a binary toggle that disables every built‑in generative AI function. Users on iOS and Android can now flip a single switch to silence features like AI‑powered translation and voice search, or cherry‑pick individual tools from the settings menu. The move arrives as Google flooded I/O with its own AI announcements. It also syncs with existing desktop settings.

The optionality mirrors a desktop rollout from February, where Firefox gave Windows and macOS users a comparable opt‑out. Critics have long accused rivals of burying privacy controls beneath feature bloat; Mozilla’s blanket disable offers a rare, user‑first choice. By exposing the toggle on mobile, the nonprofit hopes to set a precedent for transparent AI handling across browsers. Developers can reference the code in Mozilla’s open repo.

Beyond convenience, the toggle touches security research; Mozilla recently contributed to Anthropic’s Project Glasswing, probing AI’s dual role in cyber threats and defenses. Providing an easy way to mute AI reduces attack surface on devices that might otherwise leak data through voice or translation services. Firefox now gives mobile users concrete control over the AI they encounter. This functionality may influence future OS privacy policies.