When I play full-screen 1080p@60fps Youtube videos in Chrome (with MagicActions extension), my i5-4570T CPU hovers around 35-45%. Playing the same video in Edge takes up only 10% of CPU. Both use the same avc1.64 codec in HTML5 per "Stats for Nerds". Here is the video in question: https://www.youtube.com/watch?v=VurowmlQNzQ along with a screen shot of running stats:
What's the reason for such a drastic difference? Chrome used to be light and fast but has become a resource hog.