There should be a feature that allows you to like/favorite skins and add them to a list that can be easily accessible in your profile. To be honest, it's much better than just bookmarking it or downloading the skin. There are tons of skins in NameMC that everyone likes but all of them just come and ago. And I think we should add a certain like feature since it'll be useful and probably save so much space on the computer.
It would be nice if they did that, but can't you just use the skin and then leave it on your profile (under "Known Skins")?
Unless you don't want your profile to get clogged with 30+ skins.
It'd allow the creators/owners of NameMC to spend less energy/time into their website and do other things.