(In reply to Hiroyuki Ikezoe (:hiro) from comment #3) > It should be straight-forward, just removing [this condition](https://searchfox.org/mozilla-central/rev/af78418c4b5f2c8721d1a06486cf4cf0b33e1e8d/layout/style/nsTransitionManager.cpp#42) would work? I may be wrong since my memory about animation is quite stale. I will try it once the wpt gets merged. I suspect we may do other changes but I can take a look at this after the web-platform tests are ready in our repo.
Bug 1805727 Comment 5 Edit History
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(In reply to Hiroyuki Ikezoe (:hiro) from comment #3) > It should be straight-forward, just removing [this condition](https://searchfox.org/mozilla-central/rev/af78418c4b5f2c8721d1a06486cf4cf0b33e1e8d/layout/style/nsTransitionManager.cpp#42) would work? I may be wrong since my memory about animation is quite stale. I will try it once the wpt gets merged. I suspect we may have to do other changes but I can take a look at this after the web-platform tests are ready in our repo.