HTTP/3 with Firefox and forms

Ryan Gould ryanbgould at
Sat Jan 30 15:00:37 UTC 2021

no, i am not seeing a thing in the logs.  i looked
in the php error logs and the nginx error logs, and
even the non-error logs.  the page returns immediately
after the POST is attempted.  it is not spending any
time debating or processing or round-tripping.

i can also verify the most recently added patch
did not fix the problem (not that it was supposed to):

Date: Wed, 27 Jan 2021 20:25:05 +0300
From: Roman Arutyunyan
To: nginx at [mailto:nginx at]
Subject: Re: HTTP/3 with Firefox and forms
Message-ID: <64E274C9-A403-4F5C-AA02-30FBA2FEA49D at [mailto:64E274C9-A403-4F5C-AA02-30FBA2FEA49D at]>
Content-Type: text/plain; charset="utf-8"

Hi Ryan,

Thanks for reporting this.

Do you observe any errors in nginx error log?

Roman Arutyunyan
arut at [mailto:arut at]

> On 27 Jan 2021, at 19:55, Ryan Gould wrote:
> hello all you amazing developers,
> i check [] every day for new updates being
> posted. on monday (Jan 25 2021) i noticed these five new updates:
> []
> []
> []
> []
> []
> the latest build seems to have a problem with submitting forms and the
> latest production and developer versions of Firefox. i am not having
> the same problem with Edge or Chrome.
> my backend is PHP 7.3.26 on a Debian 10.7. it doesnt actually do any
> POSTing in Firefox. php is not getting any data at all. these forms
> are running code thats been untouched for five years or so.
> reverting to my Jan 11 2021 build of nginx resolves the problem for
> forms and Firefox.
> this is probably a problem with Mozilla, but if you have any fixes...
> thank you for your incredible work.
> _______________________________________________
> nginx mailing list
> nginx at [mailto:nginx at]
> []
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