Access denied after boot when reopeing some webpages

Often this computer is left on for long periods.
Last night it was turned off and when it was booted today browser prior sessions were restored.
Most Microsoft webpages displayed access denied.
Copying the URL to IE allows the webpages to open normally.
Was there a recent Firefox upgrade that blocks reopening webpages that were previously in use?
How do you troubleshoot?

https://support.microsoft.com/en-us/...-update-errors
Access Denied
You don't have permission to access "http://support.microsoft.com/en-us/help/10164/fix-windows-update-errors" on this server.

Reference #18.5d472317.1580069149.1b9f5e94

https://support.microsoft.com/en-us/...update-history
Access Denied
You don't have permission to access "http://support.microsoft.com/en-us/help/4529964/windows-10-update-history" on this server.

Reference #18.66472317.1580069133.9cd4a82b

https://support.microsoft.com/en-us/...cle-fact-sheet
Access Denied
You don't have permission to access "http://support.microsoft.com/en-gb/help/20443/windows-10-battery-saving-tips" on this server.

Reference #18.5d472317.1579991513.16dd70d8

https://support.microsoft.com/en-us/...l-numbers-when
Access Denied
You don't have permission to access "http://support.microsoft.com/en-us/help/937251/disk-drive-numbers-may-not-correspond-to-the-sata-channel-numbers-when" on this server.

Reference #18.5d472317.1580051243.19dacd87

In contrast, these Microsoft links are without problems:
https://docs.microsoft.com/en-us/pre...51579(v=ws.10)