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New versions of Firefox are very slow for download speeds. 50% of what is available from my provider. Safari is at 100%. Is this from security and filters ?

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Recently updated to the latest 2 versions and Firefox is failing download speed wise. Upload speeds are what they should be. I have ran speed tests from multiple sources and all return a similar range - 40-60Mbps. My provider speed is 100Mbps. I have run the same tests with Safari and it is operating at 100% speed wise. Are new security features and / or tracking filters responsible for this slow down ?

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Are you using a download manager add-on/program?


Start Firefox in Safe Mode {web link}

A small dialog should appear. Click Start In Safe Mode (not Refresh). Is the problem still there?


This download manager works separately from the browser. The browser tells it what to download, and off it goes.

http://www.freedownloadmanager.org It is a powerful modern download accelerator and organizer for Windows and Mac.

Helpful?

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I have the same problem, significantly reduced download speed, only in Firefox, both on Windows and Linux. Safe Mode made no difference.

Modified by zoltan.k81

Helpful?

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I'm using Firefox 78.0.2. I have Cox an an ISP, with a fiber install for 500 down/up. When I use speedtest.net, I only see speeds of 40 down, .8 up; very slow. When I use speedtest.net on Edge or other browsers, I see speeds consistently over 400 Mbps. What's the problem running this site on Firefox?

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