Mozilla release:
Mozilla developers said the first release candidate for Firefox 4 would arrive either today or tomorrow, as soon as quality assurance (QA) checks were finished.
That's already happened this afternoon, according to developer Asa Dotzler on Twitter: "QA just signed off on Firefox 4 release candidate builds."
In notes from a Firefox delivery meeting today, Mozilla reported that there would likely be no need for a second release candidate - good news given the browser has seen 12 betas and is already trailing rival IE by a few weeks.
"QA has requested more time for thorough testing, so expect at least one to two more weeks before final ship," the meeting notes said.