I'm curious, what is it that makes it Chrome only? Looks like only CSS transition and animation is special cased for WebKit but that's been unprefixed in Firef

I'm curious, what is it that makes it Chrome only? Looks like only CSS transition and animation is special cased for WebKit but that's been unprefixed in Firefox since years back. https://hacks.mozilla.org/2012/07/aurora-16-is-out/ https://hacks.mozilla.org/2012/07/aurora-16-is-out/ Edit: Seems like getComputedStyle is buggy in Firefox? « window.getComputedStyle($0).background » "" « window.getComputedStyle($0).backgroundColor » "rgb(74, 144, 226)" « window.getComputedStyle($0).backgroundImage » "none" $0 is the currently inspected element, in this case: .js-modal-2 Edit2: Possibly "works as intended"?: > getPropertyCSSValue is required to return null for these, and we implement getPropertyValue in terms of getPropertyCSSValue. https://bugzilla.mozilla.org/show_bug.cgi?id=889091 https://bugzilla.mozilla.org/show_bug.cgi?id=889091 If so, the fix would be to use the actual attributes rather than the composite attribute.