Firefox Smart Window runs on Mistral's models
The beta launches in France and North America first, with the UK and Germany following later in 2026, and no chat storage by default.
In short
Mozilla's new Firefox assistant, Smart Window, is powered by Mistral's models and is opening as a beta in France and North America.
At a glance
- Firefox Smart Window has launched as a beta and runs on Mistral's models.
- Available first in France and North America; the UK and Germany are slated for later in 2026.
- The assistant handles complex searches, recalls previously visited content, and summarizes open tabs.
- Both companies say conversations are not stored on Mozilla's servers by default and Mistral retains no data.
- Neither source names the specific Mistral models behind the feature.
Mozilla has put an AI assistant inside Firefox itself, and the models behind it come from Mistral. Smart Window is out as a beta, starting in France and North America. The UK and Germany are named for later in 2026.
What the assistant does in the browser
Smart Window targets three jobs: searches that need more than a keyword, pulling back something you visited earlier, and summarizing what sits in your open tabs. That is the work browser history, bookmarks, and copy-paste have been doing by hand. Putting it in the chrome of the browser rather than a separate tab is the actual product decision here.
How the conversation data is handled
Per both companies, conversations are not kept on Mozilla's servers by default, and Mistral commits to storing no data. That is the pitch against assistants that hold on to queries and browsing history indefinitely. What is on the record so far, though, is the vendors' own description — the available reporting does not point to an independent audit of those commitments.
What each side gets
For Mistral, a browser is a route to end users worldwide, beyond the business-customer work that has carried the company so far. Mozilla frames the browser as a place where different AI providers compete and where open source keeps a firm spot. Read plainly, neither side is describing a single-model lock-in.
The open questions
The biggest gap is the model itself: no name and no version number for the Mistral models in use appear in the available sources. There is also no firm date for the German launch, and no pricing or usage limits disclosed for the beta. Anyone wanting to verify the privacy commitments technically has no published basis to work from yet.
FAQ
What is Firefox Smart Window?
An AI assistant built into Mozilla's Firefox browser that helps with complex searches, brings back content you visited earlier, and summarizes information from open tabs. It is currently a beta.
Where can I use Smart Window?
It launched in France and North America. The UK and Germany are planned for later in 2026, with no specific date given.
Does Smart Window store my conversations?
The companies say no: chats are not saved on Mozilla's servers by default, and Mistral commits to retaining no data. No independent audit of those commitments is documented.
