Headline and Key Facts

Headline: Firefox 155 Expands AI, but Enterprise Controls Still Have Mobile Gaps

• Firefox 155, released Sept. 1, adds faster Smart Window responses and more flexible desktop AI controls for enterprises.
• Mozilla confirmed on Sept. 2 that users can block all current and future AI-assisted functions or enable them individually.
• The AIControls policy exists in standard Firefox from version 149.0.2 and in Firefox ESR from version 153; no comparable policy is documented for Android or iOS.
• The policy categories cover translations, PDF alt text, tab-group suggestions, link-preview summaries, sidebar chatbots, and Smart Window.
• Extensions can call external AI services even when Firefox AI features are locked down, leaving a remaining governance risk.

Firefox 155 puts AI choices in the foreground

Mozilla released Firefox 155 on Sept. 1, and the update signals that AI assistance is moving from an experimental layer into a core part of the browser experience. The most visible change is the expanded Smart Window tool, which Mozilla now describes as its most integrated AI experience. Users can have the assistant scan browser context, locate relevant information, answer questions, and help organize the tabs and pages they have left open from previous work.

The Firefox 155 release notes highlight faster Smart Window responses powered by Exa web-search citations. That means answers can arrive with source references pulled from the wider web instead of relying only on local browsing activity. Mozilla also says Smart Window now supports improved AI-assisted tab organization and can generate personalized prompts when a user returns to an older browsing task. These changes are intended to make Smart Window feel like a continuous work companion rather than a standalone chatbot embedded in the toolbar.

At the same time, Mozilla is making it easier to reject that assistance. On Sept. 2, the organization published updated AI guidance that reiterates a core promise: users can block supported AI enhancements, including features that may arrive in future releases, or selectively enable individual capabilities. The control layer is not limited to a single kill switch. People who want only a specific function, such as link-preview summaries or PDF alt text, can leave those on while turning off sidebars, tab suggestions, and Smart Window components that they do not want.

That split between deep integration and user choice is important for the broader enterprise discussion. Firefox is not forcing Smart Window on anyone, but it is also not keeping AI in a rigidly separate product. The assistant needs permission before it can draw on browser context, and administrators have the ability to enforce much of that decision on behalf of users across managed fleets.

Desktop and ESR

Source: eWeek News