This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

HTTP/3 issues

  • 4 پاسخ
  • 0 have this problem
  • آخرین پاسخ توسّط Merssedes

more options

Is there a way to force FF to use HTTP/3? There are multiple instances (youtube, for example) when site says "alt-svc: h3", but FF ignores it and keeps using at best HTTP/2.

Is there a way to force FF to use HTTP/3? There are multiple instances (youtube, for example) when site says "alt-svc: h3", but FF ignores it and keeps using at best HTTP/2.

All Replies (4)

more options

Hi

As a first step, I recommend updating your copy of Firefox as you appear to be using an older version.

Does this help fix the problem?

Helpful?

more options

You mean 128.0.3? Same problem.

Helpful?

more options

Enter about:config in the address bar and confirm that network.http.http3.enable = true.

Helpful?

more options

TyDraniu said

Enter about:config in the address bar and confirm that network.http.http3.enable = true.

Confirmed.

Helpful?

یک سؤال بپرسید

You must log in to your account to reply to posts. Please start a new question, if you do not have an account yet.