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Thunderbird Beta for Testers 21.0b1 Overview
Thunderbird Beta for Testers 21.0b1 was released by Mozilla Thunderbird on Jun 24, 2026, with a download size of about 10.6 MB. This update includes bug fixes and performance improvements.
You can download Thunderbird Beta for Testers 21.0b1 from APKPure with confidence. The APK file has been verified for its signature and file integrity to ensure a safe installation.
Check the "What's New" section below to see changelog details for version Thunderbird Beta for Testers 21.0b1, and view "APK Info" for package details, system requirements, and compatibility information.
As new versions of Thunderbird Beta for Testers are continuously developed, we recommend keeping the app up to date for the best experience. Download the Latest Version
What's New in Version 21.0b1
Jun 24, 2026
Thunderbird version 21.0b1
Changed:
- Animation setting now allows On, Off, and System Default options
- Modernized 'Fetching mail' account settings screen
Fixed:
- Modernized 'Composition defaults' screen
- Application could crash due to memory exhaustion
- Application could crash when rendering long messages
- Inline images were shown as attachments instead of displaying in message
- Server search results could disappear
- Links failed when trailing punctuation incorrectly included in URLs
APK Info
- Package Namenet.thunderbird.android.beta
- Version21.0b1
- File FormatXAPKAPKs
- File Size10.6 MB
- Android OSAndroid 6.0+ (M, API 23)
- Architecturearmeabi-v7a
- LanguagesEnglish 48 more
- Content RatingEveryone
- Security ReportCheck Now
- Signaturea17411f1092ca647500a8b6f0297e205088f4015
- FeedbackFlag as inappropriate
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Same As:
Package Name:net.thunderbird.android.beta
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Verified by: APKPURE
All Variants of Thunderbird Beta for Testers 21.0b1
Other Versions
16.3 MBJul 1, 2026
10.6 MBJun 24, 2026
10.3 MBJun 7, 2026
10.1 MBMay 29, 2026
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