Download/Streaming slow in Firefox, but fast in Chrome

[YLwpLUbcf77U 32]

When I download/stream from the same site in Firefox and Chrome, I get about 300KB/sec in the former and almost 3MB/sec in the latter.  What can be causing this discrepancy and how can I make FF faster?

I checked network settings in FF and have no proxy selected.  DNS over HTTPS is not enabled.

Add-ons that may affect network use in FF I have installed:  HTTPS Everywhere and Privacy Badger (disabling made no difference).

I have no add-ons installed for Chrome.

I am on Windows 10 64 with all latest system updates installed as of this morning.  The above issue, however, has been going on for a few weeks if not longer.

Any ideas?

[OpenSourcerer 1359]

Create a clean profile in Firefox and try again. To access the profile manager, start Firefox with the /P option. You can enter it by navigating to the Firefox install directory (usually C:\Program Files\Mozilla Firefox) with a command prompt/PowerShell.