!!! !!! . . !!! , :This schedule is based on the current RapidRelease plan. Future dates may change if the process changes. Code is not always released to users on the same day as the branch migration. The release to users may be a few days later, to allow for manual testing and sign-off. Note: Although the dates below specify Firefox, they will be followed by the equivalent versions of Thunderbird as well.Future branch dates merge central aurora beta release
...and so on, every six weeks. Note that for Aurora and Beta these dates represent merge days, and updated builds for those channels will be released subsequently. For Release, these dates are release days, with the merge from beta -> release happening ahead of time.