Mozilla Launches 'Smart Window' to Give Firefox Users Control Over Browser AI

Mozilla has introduced "Smart Window," an opt-in, beta AI-powered browsing mode for Firefox designed to help users organize research and maintain their train of thought. The feature provides a sidebar assistant that interacts with open tabs and browsing history to streamline the web experience.

Currently available in English for users in the U.S. and Canada, the assistant utilizes natural language search to identify duplicate tabs, suggest related tab groups, and provide visual previews of pages from a user's history. To ensure the assistant has access to current information, Mozilla partnered with Exa, enabling the AI to retrieve real-time web data and provide direct source citations within the chat interface.

A Modular Approach to AI

This launch comes as AI-native browsers from Microsoft, Perplexity, and OpenAI gain market traction. While many competitors are integrating AI by default, Mozilla is positioning Firefox as a privacy-first, agnostic alternative. Rather than forcing a proprietary experience, Mozilla has integrated AI as a modular tool. Users can manage these features through a centralized "AI Controls" panel in the settings, which includes a global kill-switch to disable all AI enhancements entirely.

Ajit Varma, Head of Firefox, stated that the goal is to explore how to make browsing context useful while keeping the user in control. Varma emphasized the importance of "digital sovereignty," noting that the system is designed so users can choose AI providers based on their own preferences or regional requirements.

Prioritizing User Sovereignty

Central to the Smart Window experience is the ability for users to select their preferred AI model. Options include Google Gemini 3.1 Flash Lite, OpenAI oss-gpt-120b, and Alibaba Qwen3-235B-A22B-Instruct-2507. For those seeking maximum privacy, the system also supports the use of local AI models.

To protect user data, Mozilla reports that these AI models operate under zero-data-retention contracts. This ensures that user prompts are not stored for human review, advertising purposes, or used to train future models, directly challenging the data-collection trends seen in other major browsers like Chrome and Edge.

What to Watch

As the feature remains in beta, the primary focus for Mozilla is testing the balance between AI utility and user privacy. Future updates may expand the availability of Smart Window beyond the U.S. and Canada. Observers will be watching to see if this "choose-your-own-model" strategy attracts a significant wave of privacy-conscious users who are wary of the locked-in ecosystems of other AI-integrated browsers.