Thunderbird Beta for Testers

Version:18.0b2(47) for Android 6.0+ (Marshmallow, API 23)

Uploaded:March 18, 2026 at 8:30PM UTC

File size:10.11 MB

Downloads:23

Version:18.0b1(46) for Android 6.0+ (Marshmallow, API 23)

Uploaded:March 17, 2026 at 5:45PM UTC

File size:10.11 MB

Downloads:23

Version:17.0b4(45) for Android 6.0+ (Marshmallow, API 23)

Uploaded:February 24, 2026 at 5:57PM UTC

File size:13.90 MB

Downloads:25

Version:17.0b3(44) for Android 6.0+ (Marshmallow, API 23)

Uploaded:February 17, 2026 at 10:19PM UTC

File size:13.90 MB

Downloads:21

Version:17.0b2(43) for Android 6.0+ (Marshmallow, API 23)

Uploaded:February 4, 2026 at 10:27PM UTC

File size:13.90 MB

Downloads:19

Version:17.0b1(42) for Android 6.0+ (Marshmallow, API 23)

Uploaded:February 4, 2026 at 3:23PM UTC

File size:13.90 MB

Downloads:13

Version:16.0b4(41) for Android 5.0+ (Lollipop, API 21)

Uploaded:January 21, 2026 at 5:46AM UTC

File size:13.07 MB

Downloads:8

Version:16.0b4(40) for Android 5.0+ (Lollipop, API 21)

Uploaded:January 20, 2026 at 11:44PM UTC

File size:13.07 MB

Downloads:27

Version:16.0b3(39) for Android 5.0+ (Lollipop, API 21)

Uploaded:December 17, 2025 at 7:13PM UTC

File size:13.07 MB

Downloads:47

Version:16.0b2(38) for Android 5.0+ (Lollipop, API 21)

Uploaded:December 9, 2025 at 5:27PM UTC

File size:13.07 MB

Downloads:48