Firefox is making all those fast changes because they are losing the race. Chrome is going through version numbers much faster and as Chrome gets further ahead of Firefox with its version numbers the percentage of people using Chrome is overtaking the number of people using Firefox. So Firefox is hoping that by trying to almost keep up with the version numbers that they might still retain some of their users rather than everyone switching to a superior browser - Chrome.
Meanwhile the best browser - Opera - which was at version 10 when Firefox was at version 3 is now at version 11.6 (since they are not racing through version numbers the way the others are).
Last edited by felgall; 02-15-2012 at 07:25 PM..