Firefox Browser fast & private
v55.0.2 · 37.6 MB · code 2015506297
Verify you're human
Solve this to start the download.
File information
UpdatedAug 16, 2017
PublishedMar 19, 2017
Packageorg.mozilla.firefox
Versionv55.0.2 (2015506297)
Size37.6 MB
MD5a63e98c49d2f8795d174032dfb8980f5
Min SDK15
ABIsarmeabi-v7a
Malware scanTRUSTED
Signature SHA192:0F:48:76:A6:A5:7B:4A:6A:2F:4C:CA:F6:5F:7D:29:CE:26:FF:2C
SignerCN=Release Engineering, OU=Release Engineering, O=Mozilla Corporation, L=Mountain View, ST=California, C=US
Total downloads500,000,000
This version500,000,000
DeveloperMozilla
Age ratingEveryone
What's new in v55.0.2
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
* 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
Security scan
TRUSTED
- Developer signature verified 2025-04-26
- Scanned for malware 2020-06-11 12:05:58
- Signature SHA1 92:0F:48:76:A6:A5:7B:4A:6A:2F:4C:CA:F6:5F:7D:29:CE:26:FF:2C
- File MD5 a63e98c49d2f8795d174032dfb8980f5
How to install Firefox Browser fast & private v55.0.2 on Android API 15+
Takes about 2 minutes. You'll need roughly 37.6 MB of free storage.
- Grab org.mozilla.firefox_2015506297.apk — hit the Download button above (37.6 MB). If your browser warns about APK files, choose Keep or Download anyway — that warning fires on every APK, not just this one.
- Trust your browser to install — on Android 8+ go to Settings → Apps → Special access → Install unknown apps, pick the app you downloaded with (Chrome, Firefox, Files, etc.), and flip Allow from this source. On older Android, toggle Unknown sources under Security.
- (Optional) Verify the file — compute the MD5 of the downloaded APK and make sure it matches a63e98c49d2f8795…. Any difference means the file is corrupted or tampered — delete and re-download.
- Open the APK — tap the download notification, or find org.mozilla.firefox_2015506297.apk in your Files app under Downloads, then tap it. Android's package installer will appear.
- Check the signer — the install screen will name the publisher. For this build it should read CN=Release Engineering, OU=Release Engineering, O=Mozilla Corporation, L=Mountain View, ST=California, C=US. If it doesn't match, cancel — you have the wrong file.
- Review permissions & tap Install — scroll the permission list, then confirm. If Play Protect flags it, tap Install anyway (this APK was scanned as TRUSTED).
- Done — open Firefox Browser fast & private — tap Open on the install screen, or find the Firefox Browser fast & private icon in your app drawer (this build targets armeabi-v7a devices).
Common install errors for Firefox Browser fast & private
- "App not installed" — usually means an older or differently-signed version is already on your device. Uninstall it first, then retry. Your data may be lost unless you back it up.
- "Parse error" — the APK is for a newer Android than yours. This version needs Android API 15 or later. Pick an older build from the versions list below.
- "There was a problem parsing the package" — the download was interrupted. Delete the file and re-download over Wi-Fi.
- Works on one phone but not another — this build ships armeabi-v7a native code. Devices with a different CPU will reject it.