1665448 - Bad dslreports bufferbloat results only in firefox.

Status: RESOLVED WORKSFORME

(Core :: Networking, defect, P3)

Description

[w0wkin]

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:80.0) Gecko/20100101 Firefox/80.0

Steps to reproduce:

You need good ISP connection like 100+ Mbit/s
0. Install latest stable firefox 64 bit under windows 10 (2004)

1. Go to dslreports.com
2. Select Speed Test
3. Press Gigabit/Fiber button
   Do it in Firefox and other browser or another firefox, some ESR.

Actual results:

When other browser will have grade A/A+ firefox score is much worse — C, D or even F
FIREFOX (80.0.1) — http://www.dslreports.com/speedtest/65614907
K-Meleon — http://www.dslreports.com/speedtest/65614511
EDGE — http://www.dslreports.com/speedtest/65615256

Expected results:

I am expecting same result like other browsers have.

Comment 1

[Timea Cernea [:tbabos][inactive]]

Hi w0wkin,

I also tried this on a Windows 10 x64 OS on the latest Firefox Release 80.0.1 and got the A+ score for BufferBoat and Quality (overall A+) 516 megabit/s and 364.2 megabit/s.

If you have any addons on Firefox can you disable them and re-run the test on the page?

Comment 2

[w0wkin]

I don't know what else I need to disable. Firefox is in safe mode — http://www.dslreports.com/speedtest/65680019
Also tried complete reset of FF. No changes. Will try other PC later.

Comment 3

[w0wkin]

Ok, other PC on the same network, same Windows 10 OS level, same FF version test is overall OK.
Same PC but under UBUNTU and FF latest — all is OK.
Same PC and OS, but running in Windows Sandbox — Bufferbloat is A+
So there is something that coming from Windows OS to FF.
Do not have any of virus/antivirus installed or enabled.
Any suggestions?

Comment 4

[Timea Cernea [:tbabos][inactive]]

Unfortunately, I don't have any idea what could impact the bufferbloat on that specific Windows OS but I am moving this over to networking so developers can weight in and most probably know better what could cause and further needed info. The antivirus check was a good practice tho.

Please also provide the system info from about:support from the Windows OS where this issue is reproducible.

Comment 5

[w0wkin]

Attachment: Rawdata from about:support

Comment 6

[Andrew Creskey [:acreskey]]

I'll see if I can reproduce this.

Comment 7

[Andrew Creskey [:acreskey]]

http://www.dslreports.com/speedtest is not working for me on desktop platform (MacOS, Windows), in either Firefox or Chrome

If anyone can reproduce the bug, please feel free to re-open with comments.