Firefox Smart Window Adds AI Form Filling and Webpage Monitoring

Mozilla’s desktop beta in the US and Canada can now fill web forms from open tabs and watch pages for changes, with data sent to Google’s Gemini 3.1 Flash Lite. Operators gain time-saving workflows but should weigh privacy.

What happened

Mozilla is updating Smart Window, Firefox’s AI-powered browsing experience, with a new feature that can help users fill out online forms based on their open tabs. As an example, Mozilla says Smart Window can pull information from an online portfolio or LinkedIn page to paste work history into a job application.

Users can try the feature by clicking into a form with at least four text fields. After clicking “Fill from sources,” Firefox shows all the tabs it will draw from; users can select or deselect tabs and the browser generates suggestions based on the information in them. This feature currently supports text fields on web forms, but Mozilla is working to add support for dropdown menus and PDFs. Mozilla notes that data from source pages is shared with Google’s Gemini 3.1 Flash Lite, the AI model that generates the text suggestions.

Along with this update, users can ask Firefox’s Smart Window to watch a certain webpage for sales, new job listings, and other updates. To set up a task, users type “/watch” in the Smart Window chat, describe what they are looking for, and add the webpages they want to watch. Firefox can then check for updates on a daily or weekly basis, but only when the browser is open.

When Firefox detects the change, it sends a notification through the Tasks button on the toolbar or on the desktop if desktop notifications are enabled. Firefox pauses watching if it does not detect a change after 60 days, then stops completely after 90 days. These features are rolling out to the Smart Window beta on desktop in the US and Canada, with other countries expected in the “coming months.”

Key facts

• Smart Window can fill web forms from open tabs, using sources such as an online portfolio or LinkedIn page to paste work history into a job application.
• The form-filling flow requires a form with at least four text fields and currently supports text fields only; dropdown menus and PDFs are in development.
• Data from source pages is shared with Google’s Gemini 3.1 Flash Lite to generate text suggestions.
• Webpage monitoring starts with “/watch,” checks daily or weekly only when the browser is open, and alerts through the Tasks button or desktop notifications.
• Monitoring pauses after 60 days without a detected change and stops completely after 90 days; rollout is to the desktop beta in the US and Canada, with other countries in the “coming months.”

Our analysis

For social media managers, creators, brand marketers, and crypto community operators, the form-filling update likely reduces repeated manual entry for any form-heavy workflow where relevant details already live in open tabs. The source example is a job application, but the same open-tab approach suggests a broader workflow: keep an online portfolio or LinkedIn page open and let Smart Window assemble answers from selected tabs. That differs from ordinary browser autofill, which usually pulls from a saved profile rather than generating responses from multiple page sources.

The monitoring feature turns the browser into a lightweight watch tool for sales, new job listings, and other updates. Because checks occur only when Firefox is open, it is best suited to desktop-based monitoring during active work hours rather than always-on tracking. The stated pause and stop rules are operationally important: a watch task will pause after 60 days without a detected change and stop completely after 90 days, so long-running tasks will not silently continue forever.

The privacy detail matters for operators handling client or community information. Mozilla explicitly notes that data from source pages is shared with Google’s Gemini 3.1 Flash Lite to generate suggestions. This means users should treat open tabs used as form sources as data read by a third-party model, not just a local browser convenience.

What it means for operators

• Use “Fill from sources” for repetitive forms where the needed details already exist in open tabs, but verify every generated suggestion before submitting.
• Keep sensitive client, brand, or community data out of tabs selected as form sources, because source page data is shared with Google’s Gemini 3.1 Flash Lite.
• Deploy “/watch” only for pages you can monitor while Firefox is open on desktop in the US or Canada; remember checks are daily or weekly and pause after 60 days without a change.
• Set calendar reminders to re-enable watch tasks before the 90-day stop if you are tracking long-term updates such as seasonal sales or recurring job listings.