If you use AI, Firefox is the browser to beat right now – here’s why

Mozilla has launched the beta of its free Smart Window AI tool for Firefox, available now on MacOS and Windows. This feature is both flexible and performant. It lets users pick from three AI models and enables privacy-aware, context-assisted browsing. This release makes Firefox a top choice for people who often work with AI.

Key takeaways

• Firefox’s new Smart Window beta is a free, powerful AI tool that runs smoothly without slowing the browser.
• Users can choose between three AI models: Fast (Google Gemini), Flexible (Alibaba Qwen), and Personal (OpenAI GPT).
• The tool features a ‘Memories’ function for recalling past chats and context-aware assistance using open tabs and history.
• It offers a privacy-aware design that operates locally when possible while integrating search for current information.
• The author argues it provides a smoother AI experience than Edge, Chrome, or Safari, potentially tipping the scales back to Firefox.

Firefox Smart Window Beta: A Powerful, Free AI Tool Arrives

Mozilla has released the beta of its free Smart Window AI tool for Firefox. You can test it now on MacOS and Windows versions of Firefox, specifically version 153 or later. Reports on its availability for Linux are inconsistent. The author checked Firefox Nightly, version 153, and Beta versions on both Ubuntu and Fedora without finding the feature, despite some user reports of it working on Linux.

An Impressive Beta

The performance and feature set of Smart Window are substantial. Its ‘beta’ label feels modest. Testing shows the tool runs smoothly and does not slow Firefox down. Flexibility is a key strength. Users can easily enable or disable the feature, set it as the default start page, and switch between three different AI models: Fast (Google gemini-3.1-flash-lite), Flexible (Alibaba qwen3-235b-a22b-instruct-2507-maas), and Personal (OpenAI gpt-oss-120b).

The tool includes a “Memories” function. This saves pieces of information to help the AI remember details from past conversations. You can enable or disable this for each chat. Other notable features include context-aware assistance that uses open tabs and browsing history. It also offers tab management help, search integration, and a privacy-aware design that operates locally when possible.

Key Features and Flexibility of Smart Window

Smart Window’s standout quality is its high flexibility. You can easily enable or disable the feature and set it as your default start page. Crucially, it does not slow down the Firefox browser.

Model Selection and Memory

Users can choose between three AI models: ‘Fast’ (Google Gemini), ‘Flexible’ (Alibaba Qwen), and ‘Personal’ (OpenAI GPT). You pick a default model during setup but can switch between them for any chat. The tool includes a ‘Memories’ feature. Saved information here helps the AI recall details from past conversations. You can turn this function on or off for each individual chat.

Other capabilities include context-aware assistance. This uses your open tabs and browsing history to provide answers and summaries. The tool also offers tab management help for grouping or closing tabs. It has integrated search that retrieves current information, plus a privacy-aware design that operates locally when possible.

Setup, Usage, and Competitive Edge

The setup process for Firefox’s Smart Window begins by selecting a default AI model from three categories: Fast, Flexible, or Personal. Next, users choose what data the tool learns from. Options include chats within Smart Window, browsing history across Firefox, or both. Users can also optionally set Firefox to always open directly to the Smart Window interface.

Straightforward Chat Interface

Once set up, Smart Window presents a straightforward chat area for interaction. A drop-down menu at the bottom-right of the chat box lets users switch between the three different AI models instantly. At the bottom left, a “+” icon makes starting a new chat simple. Next to this is a computer icon to enable or disable the “Memories” function. This uses saved information from past conversations, and you control it for each chat.

Smoother Experience Than Competitors

The author asserts that for AI use, Firefox with Smart Window offers a smoother, easier experience than Microsoft Edge, Chrome, or Safari. The tool combines the benefits of local AI, like its privacy-aware design and local operation, with the ability to fetch up-to-date information through search. This solves common problems with purely local AI solutions, such as providing old answers.

Potential Impact on the Browser Landscape

The release of Smart Window beta, combined with other recent Firefox additions like vertical tabs and its security focus, is compelling. It could lure users back from other browsers. The author explicitly states that combining Smart Window with these recent additions, plus the usual attention to security, makes a strong case for switching.

A Tipping Point Feature

The article positions Firefox as a strong contender for users who frequently utilize AI. It suggests Firefox may be ‘the browser to beat’ in this category. The author asserts that if you use AI, you should leave your default browser for Firefox. You won’t find a smoother, easier option in Microsoft Edge, Chrome, or Safari. Regarding Smart Window specifically, the author states the feature could ‘tip the scales’ and make Firefox their default browser again. It provides the best of both worlds for AI-assisted research.