When I write something into the address-bar to "google it", it can often take 20 seconds to load the page. And if I simply click the address-bar again and click enter again, it will load right away.
I don't remember changing anything, so I wonder if it's just me.
I use Firefox Developer Edition 116, now actually 117 and the issue is still here.
I feel like this was another one of those "google does something shitty to specifically target Firefox users for degraded performance" situations.
The problem goes away when you set network.http.http3.enable to false.