Is It On Arm?
F

Mozilla Firefox on Windows on ARM

Mozilla · Web Browsers
YESAn official ARM64 build is available.

Direct ARM64 installer

Confirmed Nov 4, 2026 · tested by NVIDIA, Qualcomm
Download ARM64 ↗Report a problem

Details

ARCHITECTURE
ARM64 (native)
BUILD
Official
GET IT FROM
Direct download
LICENSE
Open source
PUBLISHER
Mozilla
CONFIRMED NATIVE
Nov 4, 2026
TESTED BY
NVIDIA, Qualcomm
DOWNLOAD LINK CHECKED
Pending
ARM64 PROOF
Not yet checked
SOURCES
Our research, armrepo community list, Works on WoA (Linaro)

Make sure it's running native

  1. 01Open Mozilla Firefox, then press Ctrl + Shift + Esc to open Task Manager.
  2. 02On the Details page, right-click a column header, choose Select columns, and tick Architecture.
  3. 03Find its process. ARM64 means native. x64 means you have the emulated build, so reinstall it from the link above.
What ARM64EC and the other values mean

Questions

Does Mozilla Firefox run natively on Windows on ARM?

Yes. Mozilla publishes an official ARM64 build.

Where do I download Mozilla Firefox for ARM64?

Use the direct download link on this page. Direct ARM64 installer. If Task Manager shows the app as x64 after installing, you have the emulated build.

Will Mozilla Firefox run on a Snapdragon X laptop or Copilot+ PC?

Yes. The ARM64 build runs on any Windows 11 on ARM PC, including Snapdragon X-series laptops, Surface Pro and Surface Laptop, and other Copilot+ PCs.