2017 FIREFOX SUPPORT
"2017 Firefox Support for Windows XP and Windows Vista."
"Four years ago Mozilla moved to a fixed schedule release model, otherwise known as the Train Model, in which we released Firefox every six weeks to get features and updates to users faster and move at the speed of the Web. We studied the process carefully and learned a lot. We have also identified additional areas for improvement and it's time we iterate again."
"We are moving to a variably scheduled six to eight week release cycle for Firefox. With this new release cycle, we will deliver the same number of releases per year but gain a few significant benefits over the previous six week fixed model."
"For example, we will now be able to adjust release dates to respond to emerging user and market needs and provide at least six working weeks for every release. We also want to help support the well being and connectedness of our global Mozilla community by specifically allowing time for holidays."
"Firefox is one of the only browsers to offer any support for Windows XP and Vista. Microsoft itself ended support for Windows XP in 2014 and will end support for Windows Vista in 2017. Unsupported operating systems receive no security updates, have known exploits, and can be dangerous to use, which makes it difficult to maintain Firefox on those versions. Firefox security updates for XP and Vista users will continue until September 2017, although new features will not be offered. In mid-2017, a final support end date will be announced based on the number of users still on Windows XP and Vista."
"In approximately March, 2017, Windows XP and Vista users will automatically be moved to the Firefox Extended Support Release (ESR)."
"Firefox is one of the few browsers that continues to support Windows XP and Vista, and we expect to continue to provide security updates for users until September 2017. Users do not need to take additional action to receive those updates. In mid 2017, user numbers on Windows XP and Vista will be reassessed and a final support end date will be announced."
"In the meantime, we strongly encourage our users to upgrade to a version of Windows that is supported by Microsoft. Unsupported operating systems receive no security updates, have known exploits, and are dangerous for you to use. For planning purposes, enterprises using Firefox should consider September 2017 as the support end date for Windows XP and Vista."