Download Firefox Developer Edition 129.0b3

Get the latest features, fast performance, and the development tools!

Updated: July 14, 2024

Size:

Download

· July 14, 2024

Firefox%20129.0b3.dmg

Previous versions More »

143.0b9 September 07, 2025 149 MB 143.0b8 September 05, 2025 149 MB 143.0b7 September 03, 2025 149 MB 143.0b6 August 31, 2025 150 MB 143.0b5 August 29, 2025 150 MB 143.0b4 August 27, 2025 150 MB