The CSS WG decided to remove the fallback background color feature from css3-backgrounds (and potentially add an equivalent later using a new value type, e.g., an image() function that takes fallback). We should remove the implementation that was added in bug 322475.

:( This seems like a pretty good feature anyhow, perhaps just change it to a -moz prefixed solution for now? I think some ui features rely on this, cc'ing dao to weigh in here.

This feature is not in 3.5; I don't think we've done much UI development that's for post-3.5-only. Furthermore, there are much nicer ways to have syntax for the same feature.

Yeah, we haven't used this yet.

Comment on attachment 381965 [details] [diff] [review] patch r+sr=bzbarsky

This fixed the red chin in acid2 right? Detailed at http://whereswalden.com/2009/02/20/when-good-tests-go-bad-firefox-on-acid2/

Yes.

I don't think any documentation is needed here, since we removed a feature that we never shipped in the first place (so that we wouldn't ship it).

The implementation in bug 322475 was documented, so I need to make sure the background color fallback support isn't part of what got documented. Hence the addition of the doc-needed note here.

OK, after some reviewing of the docs, this doesn't in fact require any tweaks to the docs, so removing the tag.