Mozilla has finally brought its AI-powered “Shake to Summarize” feature to Firefox on Android. The feature was first introduced on iPhones last year, and now Android users can also use it to quickly generate summaries of webpages.
As the name suggests, users simply need to shake their phone while viewing a webpage in Firefox, and the browser will generate a summary of the content. Users can also access the feature manually through the three-dot menu by selecting the “Summarize Page” option.
Mozilla says the feature works on webpages with fewer than 5,000 words.
The AI-generated summaries are designed to adapt depending on the type of content. For example, if users open a recipe article, the feature can extract cooking steps directly. On sports pages, it can highlight scores and match results instead of summarizing the full article.
It is important to note that the feature was included in TIME’s Best Inventions of 2025 list.
However, the Android version works differently compared to iPhones. Since most Android phones currently cannot handle advanced AI summarization directly on-device, Mozilla is using cloud-based AI processing on Android.
According to the company, the summaries are generated using a Mistral-Small AI model running on Mozilla’s cloud servers.
On iPhones, things are different. Users with an iPhone 15 Pro or newer device running iOS 26 can process summaries fully on-device through Apple Intelligence. This means webpage text never leaves the phone on supported Apple devices.
The Android version currently supports only English, but Mozilla says more language support is coming soon.
At the same time, Mozilla is also expanding language support for the iOS version. The feature now supports German, French, Spanish, Portuguese, Italian, and Japanese.
