Have used Firefox for years, always do current updates. Still using Win10. After browsing for a few minutes, hard drive activity increases and the mouse and keyboard become unresponsive, returning very briefly for a second or two, before once again being unresponsive. After 10 min. or so, system returns to normal. This only happens while using Firefox. MS Edge, with all the same extensions, has no problem. Have searched many times, but no useful help is found. Have already un-checked hardware acceleration, and cleared caches, Am ready to give up and switch to Edge. Any help?