I found the setting for other browsers (I can’t put links here):
Disable HTTP/3 (QUIC) Protocol in Browsers on User Devices
To disable HTTP/3 protocol on a user device, complete these steps in the relevant browser:
Browser settings can vary for different versions.
Google Chrome
In the browser address bar, type chrome://flags. Disable the Experimental QUIC protocol option.
Microsoft Edge
In the browser address bar, type edge://flags/. Disable the Experimental QUIC protocol option.
Mozilla Firefox
In the browser address bar, type about:config. Disable the network.http.http3.enable option.
Opera
In the browser address bar, type opera://flags/#enable-quic. From the Experimental QUIC protocol drop-down list, select Disabled.