Well Mozilla is back again with their delays. Now Firefox 4 Beta 9 has been delayed and we may expect it now between January 14 to 18. Mozilla has planned to ship final Firefox 4.0 by February end.
Mozilla will soon stop shipping Firefox 3.6 to its users to clear path for Firefox 4.0. Firefox 4 Beta 9 may be released before this year end as it has only 49 blockers to be fixed.