Firefox 4 release slips to 2011

From CNET News.com: Mozilla has pushed back the planned Firefox 4 release to 2011, a delay that's no surprise given the difficulties in releasing the first full-featured beta of the open-source browser--but that also gives breathing room for several competitors.

Mozilla had hoped to release Firefox 4 in 2010, but a newly updated Firefox 4 schedule shows the first release candidate arriving in early 2011.

"Development on Firefox 4 has not slowed down, and strong progress is being made daily. However, based on the delays in completing the 'feature complete' Beta 7 milestone against which our add-on developers and third-party software developers can develop, as well as considering the amount of work remaining to prepare Firefox 4 for final release, we have revised our beta and release candidate schedule," said Mike Beltzner, vice president of engineering for Firefox, in a mailing list message yesterday. "The frequent beta releases have been extremely helpful in identifying compatibility issues with existing web content, so we plan on continuing to release beta milestones through the end of December. Our estimate is now that release candidate builds will ship in early 2011, with a final release date close behind."

Six beta versions have arrived in recent weeks, but Firefox 4 beta 7 hasn't appeared, despite more than six weeks of frenzied development. One big issue holding up release has been the integration of Firefox's older Tracemonkey engine for running Web-based JavaScript programs and the new JaegerMonkey engine that draws on Google's V8 engine in Chrome.

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