Firefox Nightly Icon

Firefox Nightly APK for Android

- for Developers
Mozilla Original
3M+
Free
Apr 10, 2026

Experimental build of a popular browser for testing

Download Firefox Nightly APK 151.0a1 198MB Old versions

What is Firefox Nightly?

Firefox Nightly – test modifications of a popular browser before the official release, helping developers to identify problems and shortcomings in the application’s functionality. Let’s make a reservation right away, the product is not aimed at a mass audience, as it is under development and does not feature high stability.

But if you like to be among the first to get the latest experimental features and feel like you belong in the development of a software product, then this option is for you. Despite possible problems, the application is fully functional and performs its primary task – web surfing with the tool is easy and safe. An improved menu that makes the most used and useful items easily accessible, intuitive and instant access to synchronized tabs, a new “Top Sites” design, and more.

Features:

  • experimental assembly for developers and active users;
  • be the first to know about new features and functions;
  • feedback for reporting bugs and shortcomings;
  • contribute to the formation of the final version.

By using Firefox Nightly and regularly using the feedback feature to report browser bugs and problems to the developer, you help make your favorite product reliable and functional.

Also known as: Firefox Nightly for Developers
Screenshot Firefox Nightly 1
Screenshot Firefox Nightly 2
Screenshot Firefox Nightly 3
Screenshot Firefox Nightly 4

Download Firefox Nightly for Developers APK for Android

What's New in Version 151.0a1

No official changelog provided for Firefox Nightly version 151.0a1. This update likely includes general stability improvements and bug fixes.

Other versions

System Requirements

OS Version
Android 8.0 (OREO) or higher
Architecture
Varies by file (Which one do I need?)
Disk Space
~250 MB free space required
RAM
2 GB
Internet
Not required
Google Services
Required
Permissions (34)
  • Internet
  • Record Audio
  • Camera
  • Access Network State
  • Read External Storage

APK File Details

Package ID org.mozilla.fenix
Available on Google Play
Developer Mozilla
License Free ( No Ads)
Content Rating Everyone
Interface Language
English +129

English, Arabic, Bulgarian, Czech, German, Spanish, French, Hindi, Hungarian, Italian, Japanese, Korean, Polish, Portuguese, Romanian, Russian, Thai, Turkish, Ukrainian, Vietnamese, Chinese, + 109 localizations

APK Verification & Virus Scan Results

Scan In Queue Signature Verified Safe & Original

Antivirus scan in queue, will be scanned soon. This APK is free of malware and its signature matches the official developer release.

Show File Details (SHA-256, SHA-1, MD5)

SHA-1 Signature:

0cb59840e844e40056ba8f233df1c764a7db4568

SHA-256 Hash:

ad1ae258bba07966657a62b14f7013c2204c635f0bd22d98c3b734fe5b5f6866

MD5 Checksum:

e0326739efe834b7e04955f1347316fb

Frequently Asked Questions

Is Firefox Nightly safe to download?

Firefox Nightly has passed a basic integrity check. A full antivirus scan is pending. You can check the current scan status in the Security section above.

How to install XAPK file?

XAPK is a split APK package. Standard Android installer cannot open it directly. Use 'SAI' or 'XAPK Installer' — they handle XAPK files automatically. Download the installer, open the XAPK file with it, and follow the on-screen steps. Read more

What Android version does Firefox Nightly require?

Firefox Nightly requires Android 8.0 (API 26) or higher. Optimized for Android 16 (API 36).

Is Firefox Nightly free?

Yes, this app is completely free to download and use.

How to update Firefox Nightly to the latest version?

Download the latest APK from this page and install it over your existing version — no need to uninstall first. Your data and settings will be preserved. We update the file as soon as a new version is released.

What processor architecture does Firefox Nightly support?

Firefox Nightly supports armeabi-v7a. This build does not support x86/x86_64 processors, so it will not run on most PC emulators. If you are unsure about your device architecture, check the Device Info section on this page.

How to enable installation from unknown sources on Android?

Go to Settings → Security (or Settings → Apps → Special access on Android 8+) and enable "Install unknown apps" for your browser or file manager. On Android 8 and above this setting is per-app, not global. Read more

If you have found any issue or are having difficulty with this page, please .

User Reviews & Ratings

Global rating(Play Store): 4.51(45.1K)
Rate this app

0.00

12345

not yet rated

Share your experience with other users.