[css-content] what does 'quotes: auto' do?

[frivoal]

In Webkit, when ::before { content: open-quote; } is used, if the computed value of quotes is auto, the quotation marks used are those that correspond to the language of the originating element (i.e. the parent of the ::before pseudo). (the same is true for the ::after or about close-quote)

In Blink and Firefox, the quotation marks used are those that correspond to the language of the parent of the originating element (i.e. the grand-parent of the ::before pseudo).

Which one do we want?

Important note: following the resolution of #5478, this does not affect the behavior of on the q element, because that element's behavior is driven by another value. So this would only be for elements where authors manually specify some-element::before { content: open-quote; } (and don't also use the value defined in #5478).

Given that new value, I'd be inclined to follow Safari here, to give authors a choice: I could reasonably see an author wanting to use a open-quote (or close-quote) on a blockquote element's ::before, or some other kind of pull quote, and wanting them to be based on the language of the element itself, rather than its parent.