Safari 16.5.1 - I had AirPort Extreme for years in our house as our WiFi router. It finally died one day so I purchased a Linksys router. I am running a desktop iMac and a MacBook with Safari. Both are at macOS Ventura 13.4.1. My wife is using an old Dell laptop Windows 11 and connecting via WiFi. Her web sites/Internet is working as fast as always. Both my iMac and MacBook have slowed to a crawl when loading web sites. I've tried everything I can think of.