Firefox Fast & Private Browser v40.0
APK · 40.9 MB · version code 1 · Android 2.3.3+ · uploaded Sep 17, 2015
- Signed differently from the Google Play version Details
- v68.10.1 is signed like the Google Play version Get v68.10.1
The source store hasn't rated this file as safe (its rating is Unknown). Prefer a version rated Trusted. See other versions.
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 40.9 MB; the latest is 128.1 MB (87.2 MB larger).
- Android: this version needs Android 2.3.3+; the latest needs Android 8.0+. Use this one if your device runs an older Android release.
- The latest version asks for 29 more permissions: Approximate location, Precise location, Access local network, Camera, Credential manager query candidate credentials, Credential manager set origin, Download without notification, Run foreground services….
- The latest version no longer asks for: View Wi-Fi connections, Read shared storage, Read phone status and identity, Display over other apps, Modify shared storage.
File information
- Version
- v40.0 (1)
- Uploaded
- Sep 17, 2015
- Size
- 40.9 MB
- Requires
- Android 2.3.3+ (API 10)
- CPU support
- Any (no native code)
- Google Play services
- Required
- Screen
- Small screens and larger
- Android TV
- Supported
- MD5
- 48af55dd4d4ec43fa2d8417b897b9326
- Signing certificate (SHA-1)
- A1:10:02:CD:9B:9F:23:98:EC:39:5D:D7:7F:28:C3:DE:34:ED:FD:42
- Signed by
- [email protected], CN=Your personal certificate, OU=fdgdfgdfgd, O=gdgbvf, L=gdfgdfg, ST=dfgfdgfd
- File name
- org-mozilla-firefox-1-10902626-48af55dd4d4ec43fa2d8417b897b9326.apk
- Package
- org.mozilla.firefox
- Downloads (all versions)
- 500M+
- Age rating
- PEGI 3 · Everyone
What's new in v40.0
Thanks for choosing Firefox! Here's what's new:
- (144.0.1) Fixed an issue where the bottom toolbar could be hidden by the keyboard.
- Translations banner: see if a page is fully translated or still in progress.
- Tracking Protection: panel shows how your privacy is protected on each site you visit.
- Platform update: Firefox now requires Android 8 or later to ensure continuous improvements to performance and security.
Have feedback? Let us know at https://mzl.la/AndroidSupport.
Permissions (8)
This version requests 8 permissions, 4 of them sensitive.
- Display over other apps Sensitive android.permission.SYSTEM_ALERT_WINDOW
- Modify shared storage Sensitive android.permission.WRITE_EXTERNAL_STORAGE
- Read phone status and identity Sensitive android.permission.READ_PHONE_STATE
- Read shared storage Sensitive android.permission.READ_EXTERNAL_STORAGE
- Full network access android.permission.INTERNET
- Prevent the device from sleeping android.permission.WAKE_LOCK
- View Wi-Fi connections android.permission.ACCESS_WIFI_STATE
- View network connections android.permission.ACCESS_NETWORK_STATE
Security & authenticity
Security rating: Unknown
Signing certificate
- Certificate issued to “gdgbvf” Not the developer's name (“Mozilla”). Names in certificates can't be verified, so this alone proves nothing.
- Signed differently from the Google Play version v68.10.1, which matches Google Play, uses another certificate. Android normally won't update an installed Play Store copy with this file. v68.10.1
Store checks
- Developer signature under review Mar 29, 2025
- Antivirus scan passed May 6, 2016
- Uploaded by “fjghjg-ghjgfjgh-mail-ru” 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 2.3.3+
You'll need about 81.8 MB of free space.
- Download the APK — tap Download APK above (40.9 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-1-10902626-48af55dd4d4ec43fa2d8417b897b9326.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 48af55dd4d4ec43fa2d8417b897b9326. 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?”. This file has no malware rating from the source store. If Play Protect warns about it, tap Cancel. 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 2.3.3+). Download it again, or pick an older version.
- Blocked by Play Protect — Play Protect checks apps from outside the Play Store. Only continue if you trust the source.