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Thunderbird Beta for Testers 25.0b1 APK download

Old versions may contain security vulnerabilities. Prefer the latest version when possible.

Version
25.0b1
Released
Oct 12, 2026
Minimum Android
Android 6
Target Android
Android 16
Package
net.thunderbird.android.beta

Download

Download 34.4 MB
SHA-256: 125d3693bcbe7d9daa66892e5c5ce48415749f1a300df64f7af7aa40ae28f5b6

This build will not install over a Google Play version of the same app. Uninstall the existing app first (back up your data).

How to install an APK file on Android · Which APK should I download? arm64-v8a, armeabi-v7a and x86 explained · How to check an APK's SHA-256 checksum

Screenshots

Thunderbird Beta for Testers 25.0b1 screenshot 1 Thunderbird Beta for Testers 25.0b1 screenshot 2 Thunderbird Beta for Testers 25.0b1 screenshot 3 Thunderbird Beta for Testers 25.0b1 screenshot 4 Thunderbird Beta for Testers 25.0b1 screenshot 5 Thunderbird Beta for Testers 25.0b1 screenshot 6 Thunderbird Beta for Testers 25.0b1 screenshot 7 Thunderbird Beta for Testers 25.0b1 screenshot 8

What's new

Thunderbird version 25.0b1

New:
• New funding appeal helps keep Thunderbird alive!
• Feature flags can be updated without app updates

Fixed:
• Deleted email notifications could reappear
• HTML signature text disappeared after rotation
• HTML drafts could hide or lose attachments
• Add to contacts crashed without a Contacts app
• Large PGP attachments showed no encryption progress
• Account drawer could behave inconsistently
• Acccount drawer controls blocked content on small displays

Permissions

No permission changes compared to the previous version.

All permissions (16)
  • android.permission.ACCESS_NETWORK_STATE
  • android.permission.CAMERA
  • android.permission.FOREGROUND_SERVICE
  • android.permission.FOREGROUND_SERVICE_DATA_SYNC
  • android.permission.FOREGROUND_SERVICE_SPECIAL_USE
  • android.permission.INTERNET
  • android.permission.POST_NOTIFICATIONS
  • android.permission.READ_CONTACTS
  • android.permission.READ_SYNC_SETTINGS
  • android.permission.RECEIVE_BOOT_COMPLETED
  • android.permission.SCHEDULE_EXACT_ALARM
  • android.permission.USE_BIOMETRIC
  • android.permission.USE_FINGERPRINT
  • android.permission.VIBRATE
  • android.permission.WAKE_LOCK
  • net.thunderbird.android.beta.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

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