HTTP/3 with Firefox and forms

[Ryan Gould]

hello all you amazing developers,


i check https://hg.nginx.org/nginx-quic every day for new updates being
posted.  on monday (Jan 25 2021) i noticed these five new updates:

https://hg.nginx.org/nginx-quic/rev/6422455c92b4

https://hg.nginx.org/nginx-quic/rev/916a2e1d6617

https://hg.nginx.org/nginx-quic/rev/cb8185bd0507

https://hg.nginx.org/nginx-quic/rev/58acdba9b3b2

https://hg.nginx.org/nginx-quic/rev/e1eb7f4ca9f1


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.
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