This is not a Facebook specific issue. Take Gmail for instance. This is easily reproducible - open the tab in Safari on the latest macOS. Keep it open for a day

This is not a Facebook specific issue. Take Gmail for instance. This is easily reproducible - open the tab in Safari on the latest macOS. Keep it open for a day. Check memory usage in Activity Monitor. It’s always more than 1GB, I’ve found. Brings my poor 8GB M1 laptop to a crawl. Why wouldn’t Google fix this obvious issue? Top comment on this thread right now assumes malice of Facebook. I’d prefer an explanation that explains why Gmail is a memory hog too. Maybe it’s just hard to develop complex web apps.