FFUpdater: Install and update browsers from Mozilla - Issues/Pull Requests are welcome
Mirrors: GitHub GitLab

Tobi823 089bffb726 * Increase max allowed age for Lockwise (for unit test) 2 weeks ago
.github 4c45288269 * fix GitHub action (2/?) 1 month ago
dev 9152546b22 - update documentation 1 month ago
fastlane cd27840207 * Ignore error and retry background update (with exponential increasing waiting time) for CancellationException, GithubRateLimitExceededException and UnknownHostException (Tobi823/ffupdater#74) 2 weeks ago
ffupdater 089bffb726 * Increase max allowed age for Lockwise (for unit test) 2 weeks ago
gradle fc62b1ff96 * upgrade com.android.tools.build:gradle to 7.0.2 2 weeks ago
.gitignore e50cfc4775 - fix warnings 1 year ago
CHANGELOG.md cd27840207 * Ignore error and retry background update (with exponential increasing waiting time) for CancellationException, GithubRateLimitExceededException and UnknownHostException (Tobi823/ffupdater#74) 2 weeks ago
GOALS.md f0ef856be0 Update GOALS.md 9 months ago
HOW_TO_CONTRIBUTE.md 49de9f6895 Update links because I renamed the Gitlab mirror from ffupdater to ffupdater_gitlab. 6 months ago
LICENSE 8b103f6ce2 Add license information 6 years ago
README.md 380dbb9f91 * improve error handling in BackgroundJob.kt 2 weeks ago
build.gradle 380dbb9f91 * improve error handling in BackgroundJob.kt 2 weeks ago
gradle.properties e50cfc4775 - fix warnings 1 year ago
gradlew fc62b1ff96 * upgrade com.android.tools.build:gradle to 7.0.2 2 weeks ago
gradlew.bat 6af86ced55 update gradle 4 months ago
run_integration_tests.sh 945cbfa327 - add scripts for running unit test and integration tests 11 months ago
run_unit_tests.sh 945cbfa327 - add scripts for running unit test and integration tests 11 months ago
settings.gradle 53536ad129 Use DownloadManager 6 years ago


Get it on F-Droid


Download, install and update these privacy friendly browsers:


FFUpdater will check periodically for updates and will display a notification when an update is available. This feature itself can be disabled and the check frequency can be changed.

FFUpdater will also automatically download the app updates in the background if the current network is unmetered and the device has enough storage.


  • only HTTPS connections
  • check certificate fingerprint of the downloaded file and installed app
  • user certificates are supported for AdGuard

You can find the APK certificate fingerprints on multiple website - e.g. apkmirror.com I did my best to make the app as secure as possible - feel free to double-check it in the source code.

Download server:

The applications are downloaded from these locations:

Temporary builds

The main distribution method of FFUpdater remains F-Droid.

But for the time between my bug fix and the release on F-Droid, you can use the attached APK file from the GitHub/GitLab release overview https://github.com/Tobi823/ffupdater/releases https://gitlab.com/Tobiwan/ffupdater_gitlab/-/tags.

You have to uninstall FFUpdater when you switch between the F-Droid version and my temporary version.

As far as I know, F-Droid will not show an update notification if the installed FFUpdater version is not signed by F-Droid. You have to manually check for updates.

My temporary version will be signed with:

Signer #1 certificate DN: CN=Tobi823, O=FFUpdater, ST=Germany, C=DE
Signer #1 certificate SHA-256 digest: f4e642bb85cbbcfd7302b2cbcbd346993a41067c27d995df492c9d0d38747e62
Signer #1 certificate SHA-1 digest: b432e9eb74512c0fa58c1ec45912a670f8dfa8e9
Signer #1 certificate MD5 digest: 78a34e36cedd844954726f1e2076642c


  • By clicking on the "i"-Icon, you can see the time of the last successful background update check.
  • Firefox Nightly: Replace the minutes with 'xx' because FFUpdater can only access the start time of the build and not the version name of the app update (finish time). The builds always starts at 5:00 and 17:00 and usually takes a few minutes.
  • I don't optimize the APK file with minifyEnabled and shrinkResources because it makes the app harder to debug
  • Tor Browser / Orbot: I will not support them because they can be installed with F-Droid. (Go to Settings > Repositories > Enable "Guardian Project Archive".) I don't feel confident enough that I can install and update the Tor Browser / Orbot securely (because I think there is much more at stake than with other browsers).

Git repositories:

3rd-party libraries:

My motivation / Project goals


How to contribute

How to contribute

Deprecated browsers

Kiwi Browser

17.04.2021: https://github.com/Tobi823/ffupdater/issues/35 Answer from the Kiwi developer:

It's actually quite simple, Kiwi earns money for every search it forwards to Yahoo or Microsoft Bing.

It seems that the developers have to forward search requests to their servers and then to the search engine in order to get paid by the search engine.

The parameters and integration method are defined by the search engines themselves, we don't have our words at all how the integration is done.

They [Yahoo or Microsoft Bing] have a standard guide on how to integrate, either you follow this guide, or you don't work with them.

I guess it's fine. Although i don't like it, i understand that the money for the app development has to come from somewhere (even Firefox is paid to use "Google" as the default search engine).

But I think that Kiwi should not be managed by FFUpdater because this browser has additional usability features and no additional privacy features. FFUpdater is about privacy and not usability.

Firefox Lite

14.03.2021: The latest release of Firefox Lite is not longer signed and thereby can't be used to upgrade an existing Firefox Lite installation. Moreover the developers haven't responded to the Github issue "[BUG] Unsigned apk ?" from 30.01.2021 https://github.com/mozilla-mobile/FirefoxLite/issues/5353. And Firefox Lite will only receive bug fixes in the future:

Firefox Lite is currently in Maintenance Mode. No active feature is being done on the product. Older Pull Requests and Issues have been marked with the archived label and have been closed. However, if you feel an issue is critical enough to be re-opened, please leave a note on the issue with an explanation.

These are the reasons why I will remove Firefox Lite.


16.05.2020: Mozilla wants to migrate from Fennec to Fenix. Fennec Beta and Fennec Nightly are already end-of-life and Fennec Release will be soon.

Fennec is being replaced by our new state-of-the-art mobile browser codenamed "Fenix". We're slowly migrating users in order to make sure the experience is as painless and as enjoyable as possible. We started to migrate users who were using Fennec Nightly in January (bug 1608882). It took us several weeks to be sure of the result and to finally offer Fenix Nightly to all users using Fennec Nightly. Another few weeks later, we repeated the same process with Fennec Beta (bug 1614287). Fenix Beta has been offered to the whole Fennec Beta population on April 22nd. We're planning to do the same with Fennec Release sometimes this year. The schedule is still to be determined.

The Google Play Store[1] has a lot of nice features, but it's still pretty basic whenever a software publisher wants to slowly migrate users. Once a migration is started, we can't provide any Fennec updates to the population who wasn't offered Fenix, yet. I can say this restriction is painful to manage for Android developers, Mozilla included. Because of it, we had to stop shipping Fennec Nightly/Beta APKs at the beginning of each migration. This explains the dates of the last builds. At the same time, we stopped building Fennec Nightly/Beta because it enabled us to save technical resources[2] as well as people's time[3].


Build app

Use Android Studio to clone and run the app. Nothing special needs to be done.


Tobiwan (now)

Boris Kraut (https://gitlab.com/krt/ffupdater, until April 2019)

Since I left F-Droid (and Android/Smartphones) about a year ago, I am looking for a new maintainer to take over. Unfortunately the upstream issue I opened years ago is still not solved in 2019. While Fennec F-Droid is back in the mainline repo and other binary repos do serve Firefox, some might still prefer this updater. So as I said: Maintainers welcome. The main task should be to test the last few merge requests (especially the background update stuff) and release a new version. New Maintainer: https://notabug.org/Tobiwan/ffupdater


FFUpdater -- a simple Android app to update Firefox.
Copyright (C) 2015-2019 Boris Kraut <krt@nurfuerspam.de>

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.