Firefox 151 Adds AI Controls to Mobile

Language support for the feature continues expanding. On iOS, summaries are available in English and several additional languages including German, French, Spanish, Portuguese, Italian, and Japanese, while Android support begins with English.

What the mobile AI controls allow you to do

Firefox’s mobile controls are designed to give users straightforward options:

• Disable all AI features in the browser
• Enable only specific tools such as translations while keeping others off
• Adjust settings later as new AI features are added

Mozilla notes that the exact list of controls may vary depending on device and region, but the underlying system is designed so users can always decide which AI capabilities remain active.

How mobile AI controls compare with desktop Firefox

Firefox introduced its AI Controls panel on desktop starting in Firefox 148, providing a centralized place to manage AI‑enhanced browser features.

On desktop, the panel includes a global toggle called “Block AI enhancements.” Turning it on disables current AI features and prevents new ones from appearing in the browser interface.

Desktop Firefox currently includes AI‑assisted tools such as:

• Website translations
• AI‑generated alt text for images in PDFs
• AI‑enhanced tab grouping
• AI‑generated key points in link previews
• A sidebar that integrates AI chatbots

Users can disable all of these features with the global switch or allow specific ones individually.

The mobile implementation follows the same philosophy, though it manages a smaller set of features tailored to smartphones — such as voice search and gesture‑based summarization.

Why Mozilla introduced AI controls

Mozilla describes the feature as a response to user demand for greater transparency and choice around AI tools in browsers. The company says the desktop AI Controls panel proved popular, prompting the expansion of the same system to mobile devices.

The goal is to ensure that AI capabilities are opt‑in features rather than unavoidable parts of the browsing experience, allowing people to use them only if they find them useful.

Other major updates in Firefox 151

Alongside the AI control rollout, Firefox 151 includes several additional updates across desktop and mobile.

Redesigned Firefox Home (New Tab page)

Firefox’s Home or New Tab page received a visual refresh designed to support upcoming widgets and improvements to shortcuts planned for future releases.

One‑tap private browsing reset

Private browsing now includes an End Private Session button (shown as a fire icon near the address bar). Selecting it clears all data from the current private session without closing the browser window.

The reset removes session data such as cookies, browsing history, logins, and other temporary information before immediately starting a new private session.

Stronger fingerprinting protection

Firefox 151 also strengthens fingerprinting protections within Enhanced Tracking Protection’s standard settings, making it more difficult for websites to track users across the web using device fingerprints.

Built‑in PDF merging

The browser’s integrated PDF viewer can now merge multiple PDF files into a single document, expanding the editing tools already available in Firefox’s built‑in PDF features.

VPN location selection

Firefox’s built‑in VPN now allows users to select the location of the VPN server used for browsing, enabling access to region‑specific content or testing how websites appear in different countries.

A browser strategy centered on user choice

Firefox 151 continues Mozilla’s broader effort to introduce new AI capabilities without removing user control. By expanding AI Controls from desktop to mobile, the browser gives people a consistent way to decide how much AI assistance they want in their browsing experience.

For users who welcome features like summaries and translations, the tools remain available. For those who prefer a traditional browser experience, Firefox now makes it possible to switch those features off entirely.