Previously, the browser required an 800MHz ARMv6 processor or faster, but Mozilla lowered the requirement to 600MHz, along with 512MB of memory, and HVGA (480x320 pixels) screen resolution.
The browser is 21.37mb btw.
more info: http://news.cnet.com...-android-reach/
Firefox 20 will have a memory requirement of just 384MB, a customizable homepage, HTML5 context menus support and private browsing.
Edited by hajj_3, 11 January 2013 - 02:28 PM.