Windows 11 Home 64-bit

For the last couple of days, FF has been signing me out of all social media sites and some other sites that are open in tabs also. I'll go back to the tab, and be signed out when I was signed in 5 minutes ago. Google, FB, Reddit all have this problem and some streaming sites. I had changed my settings to clear all data when it was closed, so I thought that might be it, but I changed it back and restarted FF and the computer and it's still doing it. Haven't tried another browser yet.