Re: [csswg-drafts] [web-animations-1] 4.3.2. Document timelines, logic (#5420)

> As for the subtraction vs addition issue, again, I believe you are correct. (Note to self to check Gecko's implementation of this, however.)

I had a look at what Gecko does, and [it appears to add the origin time](https://searchfox.org/mozilla-central/rev/2f9eacd9d3d995c937b4251a5557d95d494c9be1/dom/animation/DocumentTimeline.cpp#264-265). I tried to create a test that proves this is wrong but couldn't ([test here](https://codepen.io/birtles/pen/jOqrPdX)) so I need to try again to nut this out.

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Received on Monday, 17 August 2020 08:29:13 UTC