Firefox Fast & Private Browser
v149.0 · 119.1 MB · code 2016150058
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File information
UpdatedMar 20, 2026
PublishedAug 23, 2018
Packageorg.mozilla.firefox
Versionv149.0 (2016150058)
Size119.1 MB
MD5f41a2b095da44affdf93a06216345331
Min SDK26
ABIsarm64-v8a
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 v149.0
- Copy link text: Quickly copy a link’s visible text without opening the page.
- Refreshed toolbar: A cleaner toolbar with a modern look and improved customization.
- Remote improvements are now decoupled from telemetry requirements in Firefox Settings. You can now opt into receiving remote browser changes even if you have opted out of sharing telemetry or participating in our experimental studies.
- Refreshed toolbar: A cleaner toolbar with a modern look and improved customization.
- Remote improvements are now decoupled from telemetry requirements in Firefox Settings. You can now opt into receiving remote browser changes even if you have opted out of sharing telemetry or participating in our experimental studies.
Security scan
TRUSTED
- Developer signature verified 2026-03-20
- Signature SHA1 92:0F:48:76:A6:A5:7B:4A:6A:2F:4C:CA:F6:5F:7D:29:CE:26:FF:2C
- File MD5 f41a2b095da44affdf93a06216345331
How to install Firefox Fast & Private Browser v149.0 on Android 8.0 Oreo+
Takes about 2 minutes. You'll need roughly 119.1 MB of free storage.
- Grab org.mozilla.firefox_2016150058.apk — hit the Download button above (119.1 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 f41a2b095da44aff…. 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_2016150058.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 Fast & Private Browser — tap Open on the install screen, or find the Firefox Fast & Private Browser icon in your app drawer (this build targets arm64-v8a devices).
Common install errors for Firefox Fast & Private Browser
- "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 8.0 Oreo 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 arm64-v8a native code. Devices with a different CPU will reject it.