Firefox for Android Now Lets You Shake Your Phone to Summarise Any Webpage

Firefox Logo On Smartphone – Photo by appshunter.io on Unsplash

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Mozilla has been quietly building out AI-powered features inside Firefox, and the latest one to land on Android is genuinely worth paying attention to. The company has introduced a Page Summaries feature in the newest version of Firefox for Android — and yes, one of the ways to trigger it is simply by shaking your phone.

If that sounds familiar, it’s because Mozilla already rolled out a near-identical “Shake to Summarise” feature for Firefox on iOS back in September 2024. Android users had been left waiting, but that wait is now over.

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What Is the Page Summaries Feature?

At its core, Page Summaries does exactly what the name suggests — it reads the content of whatever webpage you’re currently viewing and generates a concise, AI-powered overview of the key points. No manual highlighting, no copy-pasting into a separate tool. Just shake your phone or tap the toolbar button, and Firefox does the work for you.

This is particularly useful when you land on a long article, a detailed product review, or a step-by-step guide and you’re not sure it’s worth reading in full. Instead of scrolling endlessly only to find the information you needed was in the third paragraph, you get a quick summary upfront and decide from there.

The feature works on English-language webpages up to 5,000 words in length — which covers the vast majority of blog posts, news articles, reviews, and how-to guides you’re likely to encounter on a daily basis.

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The Technology Behind It

Mozilla hasn’t just bolted a third-party AI tool onto Firefox and called it a day. Page Summaries runs on Mozilla’s own cloud-based AI infrastructure, powered by Mistral Small 3.1 — a compact but capable language model known for its efficiency and accuracy on summarisation tasks.

When you trigger a summary, the visible content of the page is sent to Mozilla’s servers, processed by the model, and returned to you as a digestible breakdown of the main ideas. The emphasis on “visible content” is important here: if you’re on an article that sits behind a paywall, the feature will only summarise what’s actually accessible on screen, not the locked portions.

For privacy-conscious users, it’s also worth noting that Page Summaries is disabled in private browsing mode. Mozilla has clearly thought about the scenarios where sending page content to external servers would feel intrusive, and private mode is an obvious boundary to respect.

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How to Enable or Disable It

Mozilla has switched Page Summaries on by default in the latest Firefox for Android update, which means you may already have it without knowing. Here’s how to check and customise the settings:

1. Open Firefox for Android
2. Tap the three-dot menu (top-right corner)
3. Go to Settings
4. Scroll to and tap Page Summaries
5. Toggle ‘Summarise Pages’ on or off as needed
6. Optionally toggle ‘Shake to Summarise’ on or off separately

The shake gesture is entirely optional. If you find it too easy to trigger accidentally — say, while commuting or holding the phone casually — you can disable just that part and still access summaries through the toolbar button. It’s a thoughtful separation of the two controls.

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Availability and Limitations

Mozilla has confirmed this is an experimental feature currently being rolled out in phases. That means not every Firefox for Android user will see it immediately, even after updating the app. If it hasn’t appeared for you yet, keeping Firefox updated to the latest version is your best bet.

A few things to keep in mind before you rely on it heavily:

• Works only with English-language pages for now
• Limited to pages with 5,000 words or fewer
• Paywalled content cannot be summarised — only visible text is processed
• Not available in private browsing mode
• The feature is still experimental, so occasional inaccuracies in summaries are possible

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Is It Actually Useful?

For everyday mobile browsing, this kind of feature earns its keep quickly. Think about how often you open an article on your phone while multitasking, or land on a long guide when you really just needed one specific answer. Page Summaries handles those situations well.

It’s also worth noting that Mozilla’s approach here is more measured than some of the AI integrations we’ve seen elsewhere. There’s no AI chatbot side panel, no automatic rewriting of content, no prompts pushing you toward features you didn’t ask for. It’s a single, clearly defined tool that does one thing and does it well.

For TechMitra readers who use Firefox as their primary Android browser — especially those who appreciate its privacy-first philosophy — this is a solid addition to an already capable app. Give it a try the next time you hit a long article you’re not sure is worth your time.

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Firefox Page Summaries is available in the latest version of Firefox for Android. The feature is being rolled out gradually and may not be visible to all users immediately

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Disclaimer: This article is based on Mozilla’s official announcements, company blog posts, and publicly available information at the time of publishing. Details such as feature availability, rollout status, and functionality may change over time. We have rewritten and adapted the content for clarity and reader experience. All trademarks, brand names, and product names belong to their respective owners.