An anonymous reader writes "Mozilla said that it will not be releasing Firefox 4 RC, or the final version, before early 2011. Apparently, the bugfixes in the current beta take up much more time than anticipated. Mozilla is working on the feature freeze release Beta 7, which has 14 bugs left. The beta 7 is about six weeks behind schedule and will be released 'when it is ready,' according to Mozilla. It seems as if the original schedule, which estimated that Firefox 4 RC would be released in the second half of October was a bit too optimistic. Microsoft, by the way, released a new IE9 platform preview (PP6) at PDC 20910 today."