Independent Android browser
Send any tab to your own apps with one tap, edit every button in the menu, choose where links from other apps open, and keep work and life apart in workspaces and containers. Private by default.
Dejavu is made of small things that save you time every day. Open it and everything is where you left it, on every device.
That feeling of having been here before is where the name comes from.
An independent browser
Dejavu started as a fork of Firefox for Android (Fenix), Mozilla's open source mobile browser. It is not a Firefox product, and it is not made, endorsed or supported by Mozilla.
Dejavu can sync with Zen, so if you use Zen on your computer, your workspaces show up on your phone too. But the two are separate apps made by separate people. Sync is the only thing they share.
Custom actions
Turn any web service into a button. A custom action sends the page you are on, or every tab you selected, to an app or server you choose: save it to your read-later app, post it in a chat, send it to your phone as a notification or start a home automation.
curl command.${websiteurl}.Ready-made examples
Add, remove and move any button in the menu, add new rows, and put your own custom actions between them. The first row is the actions bar below every page, so the buttons you use most are always one tap away.
Choose the buttons on pinned tabs, on other tabs, and on the bar for selected tabs too.
Choose the workspace and container that links from other apps open in: always the same workspace, the one you saw last, or a private tab.
Back takes you straight back to the app you came from.
And everything else
Keep work, study and personal browsing apart. Each workspace has its own icon, color theme and tabs, and you swipe between them. A private workspace keeps private tabs in one place.
Pin the tabs you come back to, sort them into folders, and keep your favorite sites as essentials at the top of the home screen.
Tabs in a container keep their own cookies and site data, so you can stay signed in to two accounts at once. A workspace can open all its tabs in a container. Temporary containers delete their data after their last tab is closed.
Your workspaces, with their colors and icons, containers, pinned tabs, essentials and folders stay the same in Zen on your computer and in Dejavu on your other devices. Unpinned tabs can sync too.
Open a link in split view to see two pages at once, or preview a page without leaving the one you are reading.
Telemetry, studies, search suggestions and sponsored content are off until you turn them on, and there are no ads.
Add-ons like uBlock Origin and Dark Reader, Enhanced Tracking Protection, and sync for bookmarks, history and passwords through your Mozilla account.
Sync with Zen
Dejavu joins Zen Browser's workspace sync through your Mozilla account. Setting it up takes a minute.
Sign in to the same Mozilla account in Zen on your computer and in Dejavu.
In Zen, open Settings, then Sync, and turn on sidebar sync.
In Dejavu, open Settings, then Sync with Zen, and turn on Sync workspaces.
To sync the tabs that are not pinned as well, turn on Include unpinned tabs in both Dejavu and Zen.
Download
Dejavu needs Android 8.0 or newer on a 64-bit phone, which almost every phone from recent years is. On Google Play it is in testing; the public release is planned for late October 2026.
Add the ByArchitect repository to F-Droid once, then install Dejavu from it. F-Droid keeps it up to date.
Add to F-Droid
On a computer? Scan this with F-Droid on your phone: open Repositories, tap + and scan. Or open fdroid.byarchitect.org on your phone.
The app file from the latest release on GitHub. Install it to try Dejavu right away; it does not update itself, so use F-Droid to get new versions.
Download APKWe are working on an iOS app. News about it will be shared on the GitHub repository.
Watch on GitHubQuestions
Zen Browser itself has no Android app, and its team has said there are no plans for one. Dejavu is a separate, independent Android browser that syncs with Zen: the workspaces, containers, pinned tabs, essentials and folders you have in Zen on your computer show up in Dejavu on your phone. It is not made by the Zen team.
Dejavu is a free and open source web browser for Android, built on Mozilla's Gecko engine. It keeps your tabs in workspaces, containers, pinned tabs and folders, shows two pages side by side in split view, and sends any tab to your own apps with custom actions. It is not made or endorsed by Mozilla.
Yes. Dejavu is free software under the Mozilla Public License 2.0. It has no ads and no sponsored content, and it sends no telemetry.
Add the ByArchitect repository to F-Droid and install Dejavu from it, or download the APK from the download section. It needs Android 8.0 or newer on a 64-bit phone. On Google Play it is in testing.
Contributing
Dejavu is open to contributions of every kind, and we would especially love help with design.
Screens, flows and small details that make Dejavu simpler and easier to use.
Dejavu draws its own icon set. New icons, alternative icon packs and app icons are very welcome.
New color themes for workspaces.
Corrections for Dejavu's own texts in your language.
Bug fixes and new features.
Try Dejavu on your phone or tablet and tell us what breaks.
Send designs, icon packs and themes to byarchitect@disroot.org, or open a pull request. CONTRIBUTING.md explains how each of these works and how to build Dejavu.
Sponsors
Dejavu has no ads. If you enjoy it, you can buy us a coffee. We are also open to sponsors: if you or your company want to support Dejavu, email byarchitect@disroot.org and we will get in touch.
Contact
For sponsorship, designs, icon packs, themes, or anything that is not a bug report or a feature request, write to us. Bugs and feature requests go to GitHub issues, and you can follow them on the roadmap.
byarchitect@disroot.orgThe repository is a fork of Mozilla's Firefox repository, kept up to date with it, but Dejavu is developed separately from Mozilla. The Android app is in mobile/android/fenix, and Dejavu's own code is in the org.mozilla.fenix.dejavu package. The steps to build it and run it on a phone are in CONTRIBUTING.md.
Dejavu does not collect your data. The privacy policy explains what stays on your device and what the optional features, like sync, share with Mozilla and your search engine.
Dejavu is licensed under the Mozilla Public License 2.0, like Firefox. Some third-party parts of the code have their own licenses, listed in toolkit/content/license.html.