Mistral AI Updates: September 17, 2026

1. Mistral Small 4 Became a Selectable Model in Firefox’s Smart Window

Mistral. Mozilla and Mistral announced a partnership putting Mistral Small 4 into the Firefox Smart Window beta as another selectable model rather than a single-provider default. Smart Window handles complex searches, recall of previously visited pages, and sourcing information from open tabs. The initial rollout covers the United States and Canada, with Mozilla expanding beta access and adding French-language support in France, and the UK and Germany expected later this year. Both companies state that user interactions will not be retained on Mozilla or Mistral servers for model training. Source