Currently, the only two supported ESR versions are Firefox ESR 38 and ESR 45.īy forcing all Windows XP and Vista users to one of these two ESR versions, Mozilla staff can focus on delivering security updates to only two Firefox versions, instead of 20 or 30. I am not sure how Mozilla will achieve the update but from the link I provided.įirefox users on XP & Vista will be moved to Firefox ESRĬurrently, the exact plan is to move all XP and Vista users to Firefox ESR (Extended Support Release) in March 2017.įirefox ESRs are Firefox versions (v10, v17, v24, v31, v38, and v45) for which Mozilla provides security updates for extended amounts of time.
