Comment by amaccuish

I'm the complete other way. First thing I did when setting up MacOS was to install RedQuits. I think it stopped working sometime after an update. I never liked my dock crowding up with things.

And with Firefox, it would make the "Restore all tabs on open" not work, since clicking X didn't close the app, and thus pressing Firefox again would just create a new empty window. For it to work, I had to not use the red button, but cmd + q or the menu bar.