Compare: Thunderbird Beta for Testers vs Firefox Beta for Testers
| Stats |   Thunderbird Beta for Testers |  Firefox Beta for Testers |
|---|---|---|
| User count | 133,533 | 22,224,264 |
| Average rating | 4.25 | 4.47 |
| Rating count | 1,716 | 285,565 |
| Last updated | 2026-06-04 | 2026-06-19 |
| Size | 15.74MB | 256.40MB |
| Version | 20.0b2 | 153.0b1 |
| Short description | |
|---|---|
| Thunderbird is a 100% open source, privacy focused email app. | Get the official free Firefox Beta browser and give your feedback! |
| Full summary | |
- | - |
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