I also have this issue, when on website using Widevine, my CPU just skyrockets to 100%. I tried to change many different files in the worker folder (containing the Widevine component) but when erasing the dll and manifest with x64 versions, the browser acts like Widevine isn't working. I think the only solution is an update of the worker itself. I tried to replace all files with a newer cef version but BAS can't open the browsers. If someone has any idea, or if BAS developpers can do something about it that'd be awesome !