Toregev

HTTP/3 does work when using the Brave browser with Kaspersky (haven't checked Chrome itself but I know it is HTTP/3 compatible). I imagine this will need to be implemented in some future release once HTTP/3 is more widely used. I just found it interesting that Kaspersky seems to block it for some reason with Firefox. I tried experimenting with different options in Kaspersky, along the lines of turning certain features off, but the only way to get HTTP/3 to work with Firefox was to completely exit Kaspersky.

HTTP/3 does not seem to work on Firefox (current version 91 as well as previous versions) with Kaspersky enabled. Kaspersky is at version 21.3.10.391(E) but this was also a problem on (D). If I fully exit Kasperksy, then HTTP/3 will work. https://cloudflare-quic.com/ This is the website that I have been using to test. Normally when you first go there it will say HTTP/2, but if you reload it should go to HTTP/3. If Kaspersky is running, this stays at HTTP/2