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.

Search Support

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.

Learn More

Firefox uploads slowly

more options

My upload speed through firefox seems to be capped at around 1.42 MB/s.

I reinstalled Windows and started clean with default settings, installed firefox and upload speed still at 1.42 MB/s

chrome uploads at 4.95 MB/s

any ideas?

My upload speed through firefox seems to be capped at around 1.42 MB/s. I reinstalled Windows and started clean with default settings, installed firefox and upload speed still at 1.42 MB/s chrome uploads at 4.95 MB/s any ideas?

All Replies (3)

more options

Hi, where are you uploading them to ? If a website why not use Filezilla FTP instead ?

Delete your cache and cookies.

Check if Win 10 is limiting your speed : https://www.ghacks.net/2016/08/05/windows-10-limiting-internet-speed/

What kind internet are you suppose to have ? Are you on Broadband or a DSL or wifi ? www.speedtest.net/

I can not find anything.

more options

I do use filezilla for other things but i have to upload to a website using a web browser.

it was a completely clean install of windows. There were no cookies or cache and the very first thing i tried was uploading.

Edge and Chrome are not affected why would windows only effect firefox. I read about the windows thing you posted and i dont want to mess with the settings.

I'm using xfinity and directly connected to my modem.

I tried like 5 different speed tests and they all upload at the proper speed. Could it be an issue with the site itself? why would it only effect firefox and not Edge or Chrome. I know that last part is beyond the scope of this support forum.

Thank you for your time though. It is appreciated.

more options

First time ive heard of this. Try some speed boasters software for speed settings. FF is pretty basic and dont think it has a limit on speeds. could be some configuration like a vpn or antivirus filtering its speed. Could also be some sort of addon.