Mozilla has promoted Firefox for Windows 10 on ARM to its beta channel. Anyone with an ARM-powered Windows 10 device can test it. Firefox ARM is still in beta and bugs are likely to be experienced, but Mozilla has been working on its Quantum technology to help Firefox run smoothly on Windows 10 devices with CPUs from Qualcomm. Mozilla says it has managed to push the multi-core paradigm one step further and octa-core CPU are now also supported. To further enhance the performance and deliver a faster browsing experience, Mozilla is also using Rust s fearless concurrency.
Source: https://www.bleepingcomputer.com/news/software/mozilla-firefox-for-arm64-beta-now-available/