Firefox Smart Window Gets Live Web Search and Zero-Retention AI Contracts
In this article
Starting August 18, 2026, AI chats in Firefox's Smart Window can pull from current web content and attach source links in responses through a partnership with search infrastructure company Exa. The update also adds natural-language browsing history search with visual page previews, and automatic tab group suggestions that can identify and close duplicate tabs.
A live demo showed Smart Window filtering browsing history on a query like "running shoes I looked at last week" and surfacing thumbnail images from those sessions. Mozilla says beta users reported the history search helped them maintain their train of thought. Future updates will add Chrome-style surfacing of recent browsing journeys and AI-powered autofill for online forms; no release dates were given for either.
Model Choice and Data Contracts
Users select which model powers Smart Window. The current options are Google's Gemini 3.1 Flash Lite, OpenAI's oss-gpt-120b, Alibaba's Qwen3-235B-A22B-Instruct-2507, and locally hosted models. Mozilla's head of Firefox, Ajit Varma, framed the local option explicitly around digital sovereignty: users can "choose local AIs and AI from companies that are maybe based in your region that have different views than maybe some of the big tech companies."
Every third-party model operates under what Firefox AI senior staff product manager Steve Truong described as a zero-data-retention contract. Providers run inference in memory and are contractually barred from storing prompts to train models, support advertising, or allow human review. Mozilla applies the same constraint to its own infrastructure — no user chat is retained server-side without explicit user permission, and the company states it is not using chat data for model training or advertising. For practitioners evaluating the stack, the specificity of these terms matters; multi-party data handling across inference providers is precisely where contract gaps tend to emerge.
Feature Comparison
| Capability | Firefox Smart Window (Aug 2026) | Typical Sidebar AI Integration |
|---|---|---|
| Web-grounded chat with source citations | Yes, via Exa partnership | Varies; often no live grounding |
| Natural-language browsing history search | Yes, with visual page previews | Rarely supported |
| Automatic tab grouping and duplicate removal | Yes | Not standard |
| User-selectable inference model | Yes (4 options including local) | Usually single vendor |
| Zero-data-retention contract with providers | Yes, stated explicitly | Rarely disclosed at this granularity |
| Global AI kill switch in settings | Yes, via AI Controls section | Uncommon |
| Opt-in beta status | Yes; no GA date confirmed | Often shipped as default-on |
Opt-In Design and What Remains Unresolved
Smart Window remains an opt-in beta with no confirmed general availability date. Mozilla added a dedicated AI Controls section to Firefox settings that lets users disable all AI features globally or toggle individual ones — inverting the default-on pattern common among competitors. Varma's position was direct: Mozilla does not want to be "prescriptive" about a single workflow, and sees the browser as a neutral platform rather than a vehicle to generate LLM queries.
The gap is evaluability. Mozilla has not published retrieval accuracy or citation quality metrics for the Exa-grounded responses, so practitioners cannot yet benchmark Smart Window's grounding reliability against retrieval-augmented alternatives they might build themselves. The opt-in posture and zero-retention contract language signal genuine architectural intent; independent verification becomes possible only once the feature exits beta. The broader pattern is that browser vendors are now competing on data governance terms as much as on raw AI capability — and Firefox is betting enterprises and privacy-conscious users will treat those terms as a differentiator.