Which of the following CSS features would you prefer Firefox to support first?

(note that we already support the quirky -webkit-line-clamp)

line-clamp
16.1%
margin-trim
15.2%
animating/transitioning display:none
68.7%
Poll ended at .

Thanks to everyone who responded! These three have been tricky to prioritise:

line-clamp - somewhat already supported, but the standard version has some nice new features.

Animating display:none - falling back to no animation in Firefox is non-breaking.

margin-trim - a nice feature, but ok to work around the lack of it in many situations.

But yes, I agree with the results here. This feedback has been passed onto the teams.

@firefoxwebdevs non-breaking, yes, but only if the UX team / the customer accepts "no animation in Firefox" (animation may have been sold after testing in Chrome …).
@ArneBab as web developers, our burden is explaining progressive enhancement over and over.