Mozilla has started testing an AI page summary feature in Firefox for Android Nightly. The feature creates a short overview of the webpage you are reading.
Firefox first introduced “Shake to Summarize” on iOS in September 2025. The feature can generate summaries for webpages with up to about 5,000 words. Mozilla received a TIME Best Inventions 2025 special mention for this mobile experience. The company now plans to bring the feature to Android phones as well.
Shake the phone or tap to summarize
Firefox for Android Nightly offers two ways to start a page summary.
Users can shake the phone while viewing a webpage. Firefox then opens a panel and starts generating the summary.
The browser also includes a “Summarise page” option in the three-dot menu under the “More” submenu. Selecting the option triggers the same process without using the shake gesture.
Both triggers work in current Nightly builds.
How the feature works: When the feature starts, Firefox opens a panel from the bottom of the screen and processes the page content.
After a short moment, the panel shows a brief overview and key points from the article. The summary gives readers a quick understanding of long pages without reading the full text.
How to enable Shake to Summarize in Firefox Nightly on Android
Mozilla hides the feature inside a debug menu in Firefox for Android Nightly.
To access it, open Settings, go to About Firefox Nightly, then tap the Firefox Nightly logo three times. This unlocks a “Secret Settings” page.
Inside that page, enable “Enable Shake to Summarize Feature Flag.” Firefox then adds the “Summarise page” menu item, and the shake gesture also triggers the summary panel.
Mozilla also plans to connect the feature with new AI Controls in Firefox for Android.
A Mozilla bug report states that Shake to Summarize will follow the AI Controls setting. When AI features are turned off, Firefox will disable both the shake gesture and the page summary feature.
Firefox already includes AI Controls on desktop builds, where users can manage AI features from browser settings. Mozilla now plans to bring similar controls to Android.
Mozilla has not announced Android testing yet. The feature currently runs only in Firefox Nightly, which Mozilla uses to test new features before public release.
