Mozilla is doubling down on artificial intelligence as it looks to strengthen Firefox’s position in a rapidly evolving browser landscape. The company has announced AI Window, a new opt-in feature designed to give users an AI-powered browsing companion while maintaining Mozilla’s long-standing commitment to privacy.

In a blogpost, Mozilla said that while many tech companies are building AI tools that keep users tied to a conversational interface, Firefox aims to create “a trusted companion” that enhances — not replaces — traditional browsing. With AI Window, users can choose between the familiar Firefox interface or a private window that integrates AI assistance seamlessly into their workflow.

AI Window brings conversational assistance to browsing

Mozilla says AI Window will enable users to chat with an AI assistant directly inside the browser. This companion can summarise pages, answer questions, assist with research and provide suggestions in real time — all without forcing users into a standalone chatbot experience.

The feature will be optional, and users will be able to turn it off completely if they prefer the traditional browsing setup. Mozilla also emphasised transparency, adding that AI Window is being built “in the open”, with users allowed to join a waitlist before the feature rolls out more widely.

In a community update, the company confirmed that Firefox will give users a choice of different AI models. This would make Mozilla one of the first browser-makers to allow model-level customisation, giving users more control over how their AI companion behaves.

AI Window marks Mozilla’s third recent AI-focused feature. Firefox already offers:

  • An AI chatbot in the desktop sidebar
  • “Shake to Summarize” on iOS, which generates AI-powered summaries of webpages

These additions reflect Mozilla’s growing intention to integrate AI in a user-centric and privacy-respecting way.

AI browsers challenge Chrome’s long-standing dominance

For over a decade, Google Chrome has led the global browser market with little real competition. But the rise of AI-native browsers is beginning to shift industry dynamics.

Perplexity recently launched its Comet AI browser for all desktop users and is preparing to expand it to mobile devices. Similarly, OpenAI’s ChatGPT Atlas browser has debuted on macOS, with support for more platforms coming soon. These next-generation browsers rely heavily on agentic AI — systems capable of taking actions on behalf of users — making them significantly more interactive than traditional browsers.

With competition heating up, Firefox aims to position itself uniquely. Unlike most modern browsers, Mozilla does not use Google’s Chromium codebase. Instead, Firefox runs on its own Gecko engine, giving it a fundamentally different architecture from AI browsers like Atlas, Comet, Opera and Samsung Internet.

Mozilla believes this independence can help build a more diverse and privacy-friendly web ecosystem, especially as concerns grow over data usage by AI systems.

Market share remains Chrome-heavy despite rising challengers

Even as new AI-enabled browsers emerge, Chrome continues to dominate. According to SimilarWeb data, the global desktop browser market currently stands as follows:

  • Chrome: 69.33%
  • Microsoft Edge: 15.48%
  • Safari: 7.5%
  • Firefox: 4.84%

Firefox’s market share has fluctuated over the past few years, as the browser attempts to reinvent itself amid rapid industry changes. Mozilla hopes that AI Window — combined with its reputation for privacy and open-source development — may bring users back.

Conclusion

Mozilla’s entry into AI-assisted browsing comes at a critical time. With AI-native competitors gaining traction and Chrome maintaining overwhelming dominance, Firefox’s AI Window could help the company differentiate itself while staying true to its values. As AI becomes an integral part of browsing behaviour, Mozilla’s focus on transparency, user control and privacy may give it a much-needed edge in a crowded and increasingly AI-driven market.