Firefox Fast & Private Browser v31.3.0
APK · 29.8 MB · version code 2014080005 · Android 2.2+ · uploaded Jan 28, 2015
- Same certificate as v68.10.1, which matches Google Play Details
Quick check before downloading
Answer this to unlock the download. It keeps automated downloaders away.
Compared with the latest version
The latest version is v157.0.1, uploaded Oct 6, 2026 — about 11 years after this one.
- Size: this file is 29.8 MB; the latest is 128.1 MB (98.2 MB larger).
- Android: this version needs Android 2.2+; the latest needs Android 8.0+. Use this one if your device runs an older Android release.
- The latest version asks for 24 more permissions: Approximate location, Access local network, Credential manager query candidate credentials, Credential manager set origin, Download without notification, Run foreground services, Foreground service data sync, Foreground service media playback….
- The latest version no longer asks for: Authenticate accounts, Find accounts on the device, Manage accounts, Nfc, Read sync settings, Read sync stats, Use credentials, Modify shared storage….
File information
- Version
- v31.3.0 (2014080005)
- Uploaded
- Jan 28, 2015
- Size
- 29.8 MB
- Requires
- Android 2.2+ (API 8)
- CPU support
- ARM (legacy)
- Google Play services
- Required
- Graphics
- OpenGL ES 2.0+
- Screen
- Small screens and larger
- Android TV
- Supported
- MD5
- 4629c54f1f225ccde093632756f015c4
- Signing certificate (SHA-1)
- 92:0F:48:76:A6:A5:7B:4A:6A:2F:4C:CA:F6:5F:7D:29:CE:26:FF:2C
- Signed by
- CN=Release Engineering, OU=Release Engineering, O=Mozilla Corporation, L=Mountain View, ST=California, C=US
- File name
- org-mozilla-firefox-2014080005-8343830-4629c54f1f225ccde093632756f015c4.apk
- Package
- org.mozilla.firefox
- Downloads (all versions)
- 500M+
- Age rating
- PEGI 3 · Everyone
What's new in v31.3.0
Thanks for using Firefox! Here's what we've improved in this version:
* Further enhancements to the recently-deployed mitigations for the Local Mess privacy leak.
Have feedback or suggestions? We'd love to hear from you at https://mzl.la/AndroidSupport
Permissions (27)
This version requests 27 permissions, 6 of them sensitive.
- Camera Sensitive android.permission.CAMERA
- Find accounts on the device Sensitive android.permission.GET_ACCOUNTS
- Modify shared storage Sensitive android.permission.WRITE_EXTERNAL_STORAGE
- Precise location Sensitive android.permission.ACCESS_FINE_LOCATION
- Record audio (microphone) Sensitive android.permission.RECORD_AUDIO
- Write settings Sensitive android.permission.WRITE_SETTINGS
- Add home-screen shortcuts com.android.launcher.permission.INSTALL_SHORTCUT
- Authenticate accounts android.permission.AUTHENTICATE_ACCOUNTS
- Browser provider (custom) org.mozilla.firefox.permissions.BROWSER_PROVIDER
- Browser read history bookmarks (custom) com.android.browser.permission.READ_HISTORY_BOOKMARKS
- Control vibration android.permission.VIBRATE
- Firefox fxaccount per account type (custom) org.mozilla.firefox_fxaccount.permission.PER_ACCOUNT_TYPE
- Firefox per android package (custom) org.mozilla.firefox.permission.PER_ANDROID_PACKAGE
- Firefox sync per account type (custom) org.mozilla.firefox_sync.permission.PER_ACCOUNT_TYPE
- Formhistory provider (custom) org.mozilla.firefox.permissions.FORMHISTORY_PROVIDER
- Full network access android.permission.INTERNET
- Manage accounts android.permission.MANAGE_ACCOUNTS
- Nfc android.permission.NFC
- Password provider (custom) org.mozilla.firefox.permissions.PASSWORD_PROVIDER
- Prevent the device from sleeping android.permission.WAKE_LOCK
- Read sync settings android.permission.READ_SYNC_SETTINGS
- Read sync stats android.permission.READ_SYNC_STATS
- Remove home-screen shortcuts com.android.launcher.permission.UNINSTALL_SHORTCUT
- Run at startup android.permission.RECEIVE_BOOT_COMPLETED
- Use credentials android.permission.USE_CREDENTIALS
- View network connections android.permission.ACCESS_NETWORK_STATE
- Write sync settings android.permission.WRITE_SYNC_SETTINGS
Security & authenticity
Security rating: Trusted
Signing certificate
- Certificate issued to “Mozilla Corporation” This is the certificate of the Google Play version.
- Same certificate as v68.10.1, which matches Google Play v68.10.1
Store checks
- Developer signature under review Mar 29, 2025
- Antivirus scan passed Oct 14, 2020
- Uploaded by “dssergio” 25 followers · uploading since 2015
Scans come from the source store; the certificate comparisons are AAPKs's own, made from the files' published signatures (6 other versions compared). AAPKs doesn't scan files itself.
How to install Firefox Fast & Private Browser on Android 2.2+
You'll need about 59.7 MB of free space.
- Download the APK — tap Download APK above (29.8 MB). Chrome shows “File might be harmful” for every APK file; choose Download anyway only if you trust this file.
- Open the file — tap the download notification, or open Files › Downloads and tap org-mozilla-firefox-2014080005-8343830-4629c54f1f225ccde093632756f015c4.apk.
- Allow the install (first time only) — Android 8 and later asks for permission the first time an app opens an APK: tap Settings in the prompt, turn on Allow from this source, then go back. Manual path: Settings › Apps › Special app access › Install unknown apps (on Samsung: Settings › Apps › ⋮ › Special access). On Android 7 and older: Settings › Security › Unknown sources.
- Check the file (optional) — the MD5 of the downloaded file should be 4629c54f1f225ccde093632756f015c4. If it differs, the file is damaged or was changed: delete it and download again.
- Tap Install — Android asks “Do you want to install this app?”. If Google Play Protect shows a warning, read it before you continue: the source store rated this file Trusted, but only install apps from sources you trust. If an earlier version is installed, this one only installs as an update when it is signed with the same certificate (SHA-1 shown above).
- Open Firefox Fast & Private Browser — tap Open on the install screen, or find it in your app drawer.
Common install problems
- “App not installed” — a version signed with a different certificate, or a newer version, is already installed (Android doesn't allow downgrades). Uninstall it first; back up your data, because uninstalling deletes it.
- “There was a problem parsing the package” — the file is incomplete, or your Android is too old (this version needs Android 2.2+). Download it again, or pick an older version.
- “App not compatible with your device” — this build contains native code for ARM (legacy) only. Devices with other processors can't install it.
- Blocked by Play Protect — Play Protect checks apps from outside the Play Store. Only continue if you trust the source.