Firefox is rolling out something pretty unusual in today’s AI-obsessed browser world: an actual off switch. Instead of quietly sneaking more AI into your phone, Mozilla is giving Firefox mobile users a clear, front-and-center way to decide how much AI they want in their browsing – from “sure, I’ll try summaries and translations” all the way down to “no AI at all, thanks.”

On desktop, Mozilla has already been experimenting with a dedicated AI controls panel in Firefox, a place in settings where you can see every generative AI feature in one spot and either fine-tune them or kill them entirely with a single toggle. That’s now making its way to your phone. With the latest release, Firefox is bringing those AI controls to iOS and Android, and they’re not hiding it in some obscure menu – this is meant to be obvious, understandable, and actually useful.

If you’ve used Firefox on mobile, Mozilla’s pitch here makes sense. Phone browsing is intimate and constant: the link someone just dropped in your group chat, the product review you skim in the checkout line, the long-read you half-finish before bed. Mozilla’s argument is that if AI is going to sit in the middle of all that – offering summaries, translation, smarter search – you should be the one deciding how much it gets to participate, not the browser or some distant product roadmap.

So what actually changes on mobile? In practical terms, Firefox on Android and iOS now exposes a simple set of AI switches. Depending on your region and device, you can toggle things like website translation, voice search on Android, and the increasingly prominent “Shake to Summarize” feature on iOS, all from one place. Mozilla says these controls roll out to mobile starting May 19, alongside Firefox 151, which is the release tying all of this together on both platforms.

The controls themselves are straightforward by design. If you’re done with AI entirely, you can turn off Firefox’s AI features across the board. If you’re somewhere in the middle – maybe happy to use translations but not interested in summaries, or fine with voice search but not with a chatbot sidebar – you can pick and choose, and then come back later and adjust as Mozilla adds new features. It’s less “all-in AI future” and more “build your own level of AI comfort.”

“Shake to Summarize” itself is a good example of how this fits into real-world use. Mozilla first launched the feature on iOS in 2025: open a long article, shake your phone, and Firefox generates a quick digest so you can get the main points without scrolling forever. Under the hood, it uses AI to compress the page into a short summary, and it works on pages up to around 5,000 words, which covers most news stories and explainers people encounter in day-to-day browsing. Mozilla has been testing the feature on Android as well, where it’s connected to the same AI controls system; if you disable AI features, the shake gesture and summary panel simply go away.

Website translation, another switch in the new controls, is one of the more practical AI-adjacent features in modern browsers. Firefox’s translation tools help you read sites in your preferred language, and they live alongside a growing list of AI-enabled enhancements like link previews, AI-generated alt text for PDFs, and tab organization in the desktop version. On mobile, translations and voice search are the headline capabilities today, but Mozilla is clearly setting up a framework to manage whatever else it adds next.

What’s interesting is how different this feels from the rest of the browser market. Over the last year, competitors have raced to weave AI into every corner of the experience: AI sidebars, generative overviews on search results, chatbots pinned to your toolbar, auto-written summaries, and so on. In many cases, those features arrive as opt-out rather than opt-in, with pop-ups nudging you to try “smart” additions whether you asked for them or not. Mozilla is going in the opposite direction by formalizing a “Block AI enhancements” style setting on desktop and carrying the same philosophy over to mobile.

On Firefox desktop, the AI controls panel introduced with version 148 acts as a central hub where you can globally block present and future generative AI features, or manage them individually. Flip the master switch, and Firefox stops promoting AI features, hides AI pop-ups, and essentially behaves like a pre-AI browser again. Bring that mindset to mobile, and suddenly the story is less about yet another AI feature and more about power dynamics: who actually gets to decide what AI is allowed to do inside your browser.

That fits neatly with Mozilla’s long-standing privacy stance. Going back years, the organization has framed its products around data minimization and user choice, emphasizing that it collects only what it needs, de-identifies it when possible, and deletes it when it’s no longer necessary. AI changes the stakes a bit, because these features often rely on sending text, images, or page content to remote models for processing. By surfacing controls that let people say “yes” or “no” at the feature level – and even “no to all of it” – Firefox is trying to bake that privacy philosophy into the AI era rather than treat it as an afterthought.

There is also a subtle but important design point here: Mozilla isn’t anti-AI; it’s anti-mandatory AI. The company is still building AI-powered tools it thinks are legitimately useful, from translations to page summaries, and experimenting with chatbots and other helpers in the desktop version. But it’s wrapping those experiments in clear, accessible controls that acknowledge a reality many tech companies gloss over: people have wildly different comfort levels with AI, and those preferences can change over time.

Viewed in the larger context of AI hype, Firefox’s mobile AI controls feel almost like a pressure valve. If you’re excited about AI, the browser now gives you more toys to play with, plus the reassurance that you know where they live and what they’re doing. If you’re exhausted by constant AI prompts, or you simply don’t trust generative features yet, you get a straightforward way to turn the whole thing off and keep using the browser you’re already comfortable with.

This isn’t going to stop other companies from pushing AI deeper into their browsers and apps, and Mozilla isn’t pretending otherwise. But by putting AI controls on mobile this early – and tying them to a clear philosophy of “AI on your terms” – Firefox is staking out a distinct position in the AI browser wars: it wants to be the app that lets you decide how much AI belongs in your pocket, instead of making that decision for you.