Firefox 148 launches with a user-controlled AI kill switch feature, letting users disable chatbot prompts and AI-generated link summaries permanently. Mozilla’s move signals a shift toward prioritizing user choice over automated AI integration, with the toggle locking the setting across future updates. To disable AI tools, users access _Settings > AI Controls_ and enable “Block AI Enhancements,” which strips in-app prompts and removes cached AI models. A hybrid option retains select features like on-device translation while blocking cloud-based AI services.

The update expands privacy controls through remote update management, allowing users to opt out of automatic updates while still limiting data collection. Preferences are set under _Settings > Privacy & Settings > Firefox Data Collection_, balancing security and user autonomy. Technically, Firefox 148 integrates the Trusted Types API and Sanitizer API to harden defenses against cross-site scripting (XSS) attacks, a critical step for web security.

Beyond privacy, Firefox 148 adds on-device PDF formula accessibility for screen readers, Vietnamese and Traditional Chinese translation support, and WebGPU service worker compatibility. New container tabs feature customizable new tab wallpapers, while Windows 10 users gain Firefox Backup functionality. These updates reflect Mozilla’s focus on technical robustness and inclusivity.

By anchoring user agency in AI and privacy, Firefox 148 addresses growing concerns about opaque tech ecosystems. The AI kill switch sets a precedent for granular control, while security APIs and accessibility tools position Firefox as a browser prioritizing both safety and usability.