On the March 17th Release Update and we incorrectly stated there would be a Firefox 3.6.29 on April 24th as the final release for the Firefox 3.6.x branch. Firefox 3.6.28 released on March 13th is the final release on the Firefox 3.6.x branch. However, in the unlikely event of a chemspill update resulting in a Firefox 3.6.29 release, this in turn would be the final release. After April 24th users will need to move to Firefox 12 or Firefox 10.0.x ESR (for those who’s computers do not support the requirements for Firefox 12).
Thanks to Mozilla’s Daniel Veditz for the clarification.