@Gulli: You are probably right, but I don't think that everything written in ARM assembler has to be re-written. There are various other ways, for example cross-assembler or emulation (wich would be needed for legacy software anyway), to make it run on x86-64.
RISC OS Firefox port in bug fix update The seventh release of the open source port of Firefox, which uses version 220.127.116.11 of the web browser's source code, is now available for download for Iyonixes, A9homes, Omegas and VirtualRiscPC users. 21 comments, latest by Spriteman on 9/1/09 11:50PM. Published: 1 Jan 2009