Download Firefox Developer Edition 144.0b4

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

Updated: September 24, 2025

Size: 152 MB

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152 MB · September 24, 2025

Firefox%20144.0b4.dmg

Previous versions More »

144.0b9 October 05, 2025 151 MB 144.0b8 October 03, 2025 151 MB 144.0b7 October 01, 2025 151 MB 144.0b6 September 28, 2025 152 MB 144.0b5 September 26, 2025 152 MB 144.0b4 September 24, 2025 152 MB