Mozilla Launches Firefox 153 Smart Window Beta on MacOS and Windows With 3 AI Models
Updated
Updated · ZDNet · Aug 19
Mozilla Launches Firefox 153 Smart Window Beta on MacOS and Windows With 3 AI Models
3 articles · Updated · ZDNet · Aug 19
Summary
Firefox 153 adds Smart Window beta on MacOS and Windows, giving users a free built-in AI interface that can also be set as the browser’s default start page.
Three model options power the feature—Fast, Flexible and Personal—mapped to Google Gemini, Alibaba Qwen and OpenAI gpt-oss, with switching available during setup or per chat.
Smart Window also includes Memories, context-aware help using tabs and browsing history, tab management, search integration and local operation when possible, while letting users disable memory collection chat by chat.
Linux support was not available in the reported testing, leaving the beta limited for now even as Mozilla positions the feature as a differentiator against Chrome, Edge and Safari.