Mozilla has introduced an open source AI Window in Firefox, giving users optional AI assistance while countering the rise of locked-in, AI-first browsers.
Mozilla has unveiled ‘AI Window’, an open source AI feature built directly into Firefox, designed to let users chat with an AI assistant as they browse. Developed as an open-source upgrade, the new tool reinforces Mozilla’s commitment to transparency and user autonomy while introducing intelligence and personalisation inside the browser.
AI Window remains entirely user-controlled. It is not enabled by default, requires explicit opt-in, and can be turned off at any point, ensuring that users retain full authority over when and how they engage with AI. The feature is currently being rolled out in testing to those who join a waitlist.
Mozilla highlights that its approach is guided by transparency, accountability, and respect for user agency, positioning these principles as essential to keeping the web “free, open, and accessible to all.”
Distinguishing itself from AI-first browsers, Mozilla argues against closed, conversational ecosystems. As the organisation states: “While others are building AI experiences that keep you locked in a conversational loop, we see a different path, one where AI serves as a trusted companion, enhancing your browsing experience and guiding you outward to the broader web.” Mozilla further emphasises its user-first stance: “In Firefox, you’ll never be locked into one ecosystem or have AI forced into your browsing experience. You decide when, how or whether to use it at all.”
The launch comes amid a surge of AI-centric browsers such as Dia, Perplexity’s Comet, and OpenAI’s ChatGPT Atlas. AI Window now joins Firefox’s Classic and Private modes as an optional, intelligent layer, complementing other recent additions including support for Perplexity AI searches.
