Unprefixing intrinsic size keywords (-moz-min-content et al)

Hi all!

We (blink) would like to unprefix the intrinsic sizing keywords:
https://drafts.csswg.org/css-sizing/#width-height-keywords

We support them for widths and for heights (though they all do the same thing for heights)

We were wondering what Gecko's plans for those keywords is -- are you also interested in unprefixing? Are you happy with the keywords as specced? Would you rather stop supporting them?

thank you!
-christian