IE and Edge never actually "passed" Acid3 either; as I recall they typically got to scores of 100 but would lag on two numbers, I want to say they were 25 and 69, whereas the test explicitly says that the animation needs to be fluid.
Does any browser pass, then? Current Chrome and Firefox both lag on 69 for me.
I got Firefox 47.0.1 to pass with 100%, but only when I reloaded the page. It failed the first time with only 99/100. Passing may require a very fast internet connection or cached data.