Popular: Data updated October 27, 2026

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Internet1,356
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Firefox Developer Edition (MSIX): all versions and old releases

The Firefox release channel below Beta and above Nightly. Get the latest features, fast performance, and the development tools you need to build for the open web using Firefox Browser Developer Edition.

Mozilla Corporation Web browsers

12 versions of Firefox Developer Edition (MSIX) are listed here, from February 13, 2026 to the current 160.0.1.0. Each one links to the publisher’s own installer files.

2026: 12 12 26
VersionDateSizeFiles
160.0.1.0Latest October 26, 2026 — 64-bit MSIXARM64 MSIX32-bit MSIX
159.0.5.0 October 21, 2026 193.8 MB 64-bit MSIX 193.8 MBARM64 MSIX 182.6 MB32-bit MSIX 175.1 MB
159.0.4.0 October 19, 2026 — 64-bit MSIXARM64 MSIX32-bit MSIX
159.0.3.0 October 16, 2026 — 64-bit MSIXARM64 MSIX32-bit MSIX
159.0.2.0 October 14, 2026 — 64-bit MSIXARM64 MSIX32-bit MSIX
159.0.1.0 October 12, 2026 — 64-bit MSIXARM64 MSIX32-bit MSIX
158.0.5.0 October 7, 2026 — 64-bit MSIXARM64 MSIX32-bit MSIX
158.0.4.0 October 5, 2026 — 64-bit MSIXARM64 MSIX32-bit MSIX
158.0.3.0 October 2, 2026 — 64-bit MSIXARM64 MSIX32-bit MSIX
158.0.2.0 September 30, 2026 — 64-bit MSIXARM64 MSIX32-bit MSIX
158.0.1.0 September 28, 2026 — 64-bit MSIXARM64 MSIX32-bit MSIX
148.0.15.0 February 13, 2026 — 64-bit MSIXARM64 MSIX32-bit MSIX

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  • Mozilla VPNSecurity, reliability and speed — on every device, anywhere you go.
  • Firefox Beta (MSIX)The Firefox release channel below standard and above Developer Edition. Since the MSI and EXE versions of Firefox Beta usually share the same program info as Firefox Standard, this package is the only known way to consistently get Beta.

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