Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

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.

Avatar for Username

Cari Bantuan

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.

Pelajari Lebih Lanjut

Utas ini telah diarsipkan. Silakan membuat pertanyaan baru jika Anda membutuhkan bantuan.

Slow download in Firefox

  • 2 balas
  • 2 memiliki masalah ini
  • 16 kunjungan
  • Balasan terakhir oleh john336

office.copyservice
office.copyservice
more options

I test my speed. With firefox download speed are 341.9 Mbps , and with Chrome download speed are double 697.0 Mbps. I try refresh firefox, update firefox, reset to default, remove and reinstal in other folders, upgrade to win10, but nothing work. My PC is HP Z400, with Win 7 x64 , with SSD, conection to internet is gigabit

I test my speed. With firefox download speed are 341.9 Mbps , and with Chrome download speed are double 697.0 Mbps. I try refresh firefox, update firefox, reset to default, remove and reinstal in other folders, upgrade to win10, but nothing work. My PC is HP Z400, with Win 7 x64 , with SSD, conection to internet is gigabit
Lampiran tangkapan layar

Semua Balasan (2)

john336
john336
more options

I have the same problem.

Running a download speed test, I get close to 50 Mbps with Chrome. With Firefox on my laptop I get around 20 Mbps on average. It varies a lot: very rarely I can get close to 50 Mbps, but it can be as low as 5 Mbps. This is not because of my Internet provider. I have tested this numerous times. When downloads are terrible with Firefox, I can get fast downloads with Chrome — always. I have never got below 47 Mbps with Chrome.

I have spent three days trying to solve the problem. Running Firefox in safe mode didn't help, nor did running Malwarebytes or doing a full scan with Total Antivirus.

Finally, I reset the operating system (Windows 10) and reinstalled Firefox as my first and only software installation (besides those loaded as part of Windows) — with no Firefox add ons. This didn't help either.

Curiously enough, the one thing that works is to run Windows (not Firefox) in safe mode. However, trying to replicate this in normal mode by disabling start up items or services didn't work. Specifically, I used the commands "net start > norm.txt" and "net start > safe.txt" (running cmd in Administrator mode) to find what services were running in both normal and safe mode and I then disabled using System Configuration all the services running in normal mode that were not running in safe mode. This didn't help.

john336
john336
more options

Follow up: I was due for an upgrade to my SSD, so I did the upgrade, which involved a new installation of the operating system. The speed problem went away. I still have no idea what caused it.

I haven't reinstalled all of the programs. I will test the download speed as I do. If a particular program installation causes the problem to reappear, I will post back.