Auto Minimize by Lionel Wong

Whatever your reasons for this – maintain a comfortable auto-window-tiling arrangement, keep your Mac's App Exposé view manageable, et cetera – it's here for you.

Prioritizes minimizing the least-recently-focused minimizable windows. Auto Minimize keeps track of focus-change times and remembers them between browser restarts. For convenience, if you are a Winger user, upon installation Auto Minimize will make a one-time request from Winger for existing focus-change time data so that Auto Minimize can hit the ground running.

Permissions

Access recently closed tabs — Refers to sessions access, to save and remember window focus-change times across browser sessions. Despite the official description of this permission, Auto Minimize does not need to – and does not – access or affect tabs in any way.