Is Firefox heading for a huge user decline?

An interesting question appeared on Quora the other day: Will Firefox have double-digit market share in 3 to 5 years? Seems like they are going to start to see massive erosion in share as Chrome/Safari and IE9 continue pushing forward.

http://www.zdnet.com/blog/hardware/is-firefox-heading-for-a-huge-user-decline/8344