User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Firefox/78.0

Steps to reproduce:

• Active HTTP/3 for test.
• I'm now it's a new feature and very experimental
• Just registering the problem I've encountered
• Try to use during the day

Actual results:

• Terrible, pages partially load
• Google sites, Google maps, reCaptcha, Google Photos: all working terrible.
• Sometimes needs many page refreshes to work
• Unstable

Expected results:

Just trying to help to found the problems.

Thanks!

The devtools can't know the status, sometimes load but sometimes not load:

• https://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js
• https://fonts.googleapis.com/css?family=Fjalla+One&subset=latin,latin-ext
• https://www.google.com/favicon.ico
• https://ssl.gstatic.com/gb/images/a/911e3628e6.png
• https://ssl.gstatic.com/gb/images/p1_6269e604.png

The resources appears to be lost in the load and I can't see easy what happened.
I know there is a http log, but is very verbose to me.

I think the load is unstable because when reload the pages, sometimes the resource is loaded by HTTP2.
And some resources works better in HTTP/2. I don't know certainly.

Thanks

Partial load https://drive.google.com/file/d/14RNC_DfCVUKk5srqe1aNK-hCDWFUgZy6/view

Partial load HTTP/3, load problems:

• https://fonts.googleapis.com/css?family=Google+Sans:300,400,500,700
• https://www.gstatic.com/_/apps-fileview/_/js/k=apps-fileview.v.pt_BR.M-utoAyy85Y.O/d=1/ct=zgms/rs=AO0039uHwWWwyq5_XmzTfQXdKeOJlMQppw/m=v
• https://www.gstatic.com/_/apps-fileview/_/ss/k=apps-fileview.v.Bvi81gBPUiI.L.F4.O/d=0/ct=zgms/rs=AO0039u_W0_lB_rEycj18fBySIdxpzeF8Q
• https://www.gstatic.com/og/_/js/k=og.qtm.en_US.sdX7eYboDQI.O/rt=j/m=qabr,qgl,q_d,qdid,qcwid,qmutsd,qbg,qbd,qapid/exm=qaaw,qadd,qaid,qein,qhaw,qhbr,qhch,qhga,qhid,qhin,qhpr/d=1/ed=1/rs=AA2YrTsAubtab9_F5m_I5eDXQWj_ijrAkg
• https://www.gstatic.com/og/_/ss/k=og.qtm.-1ja76zl7zruhx.L.F4.O/m=qdid,qcwid/excm=qaaw,qadd,qaid,qein,qhaw,qhbr,qhch,qhga,qhid,qhin,qhpr/d=1/ed=1/ct=zgms/rs=AA2YrTuEFdcecpv12CO6sOgFARPb1QpBwA
• https://www.google.com/js/bg/MxL3AHdviLpGhskdFVPelf6MLJbI6w6qbIGRvcXS5BY.js

Fine load, all reloads:

• https://drive.google.com/file/d/14RNC_DfCVUKk5srqe1aNK-hCDWFUgZy6/view
• https://ssl.gstatic.com/docs/doclist/images/icon_14_pdf_favicon.ico

Thanks!

It's hard to use HTTP/3 with that type of problem.

https://drive.google.com/file/d/14RNC_DfCVUKk5srqe1aNK-hCDWFUgZy6/view
After many tries, load fail:

• https://lh6.googleusercontent.com/nFWAJhLsLPT9gh2M_mVlLpCmoVCtLikIDcJAtqsGDSZPZptTsosrBWOjsLoR2Ddy8ZinmScDaR5gDwxKg9AL=w800
• https://aa.google.com/u/0/_/bgogb/program/get?rt=j&sourceid=25
• https://lh3.googleusercontent.com/a-/AOh14GieMNXWC3u1ejbtZUv6_Jk5NUz4IXnwjsvUsGfH=s64

But page usable.

In google translate: https://translate.google.com/

Problems to load with HTTP3(HTTP/3):

• https://fonts.googleapis.com/css?lang=pt-BR&family=Product+Sans|Roboto:400,700
• https://www.gstatic.com/images/icons/material/anim/mspin/mspin_googblue_medium.css
• https://lh3.googleusercontent.com/-p-6G3EH16TQ/AAAAAAAAAAI/AAAAAAAAAAA/AMZuucmt3H7rYJzXJTMvTtqBiUSdQ2A9xQ.CMID/s32-c/photo.jpg
• https://ssl.gstatic.com/inputtools/js/ln/17/en.js
• https://ssl.gstatic.com/inputtools/js/ln/17/pt-BR.js
• https://ssl.gstatic.com/inputtools/js/config/49160274.js
• https://translate.google.com/translate/releases/twsfe_w_20200505_RC00/r/js/translate_m_pt-BR.js
• https://ssl.gstatic.com/translate/ic_translate_googblue600_20dp.svg
• https://ssl.gstatic.com/translate/1x_mobile.png

Very unstable.

Thanks!

Thank you very much for the detail report.
Google developers and some of us here at Mozilla were looking into this for some days already.
The Google developers found out that this is a problem on their side. They are working on a fix.