I have tried many of the suggestions to fix the message that appears on a yellow bar the say in effect "another program is slowing down your computer. It sure is. When I'm working on my eBay business, and the only program running is eBay. I get this message in between changing one task to another. It's extremely frustrating. And if I can't get this fixed I'm going to have to stop using Firefox. I have tried the "fix" to refresh Firefox. I'm using version 84 on my Windows 10 OS. I'm a very experienced user (since the 70's) but not a Techy. Bob