FWIW, I use Firefox on a 10 year old phone with Android 5.1, and it runs just fine. The phone is built on an x86 Atom SoC, though. https://www.intel.com/conten

FWIW, I use Firefox on a 10 year old phone with Android 5.1, and it runs just fine. The phone is built on an x86 Atom SoC, though. https://www.intel.com/content/www/us/en/products/sku/75203/intel-atom-processor-z2520-1m-cache-1-20-ghz/specifications.html https://www.intel.com/content/www/us/en/products/sku/75203/i...