What OS? Fresh Firefox instance, Windows 10, hitting homepage without logging in. 2 seconds, if that, page is fully loaded. Chrome, I am logged in, but still

What OS? Fresh Firefox instance, Windows 10, hitting homepage without logging in. 2 seconds, if that, page is fully loaded. Chrome, I am logged in, but still using the old UI somehow. Same 2 second page load. Core I7-8550. 16GB of RAM. Running on a laptop whose battery is pretty much useless and whose fans are rather upset at the moment!