I did some work on backporting some of the upstream changes that enabled ARM64 Windows support but I was never even able to get it to the point that mach configure completed successfully. I got to the last step of mach configure and then it failed on some ICU errors that I didn't understand.
There is a significant amount of work required to reach this goal: https://bugzilla.mozilla.org/show_bug.cgi?id=1480548
FWIW the x86 and x86_64 versions did run on ARM64 last time I test it in the x86 Windows compatibility/emulation layer but it is slow.
There is a significant amount of work required to reach this goal: https://bugzilla.mozilla.org/show_bug.cgi?id=1480548
FWIW the x86 and x86_64 versions did run on ARM64 last time I test it in the x86 Windows compatibility/emulation layer but it is slow.