Some possible causes for "You don't have permission..."

If you are using a VPN when accessing these sites.

If you have customized any preferences that affect browser requests. For example, modifying your user agent or referring header or using an extension/add-on that does.

If you have Firefox set to block ALL cookies.

Using a proxy server. Changing those settings:

Menu -> Settings -> General page -> Network Settings (at the bottom of the page) Click the Settings button, change the top setting to "No Proxy" and then click OK.

I use the same vpn on all my devices. I have tried clearing all bookmarks and uninstalling and installing Mozilla no help. I have no trouble with chrome and edge browsers on the same computer. Unless you can fix it or tell me how my next solution is to cancel Firefox completely and use Chrome or edge

There have been several reports of that problem with that site. The discussion in the following may help.

https://support.mozilla.org/en-US/questions/1328800

I've also seen cases where having "Resist Fingerprinting" enabled caused this issue to occur.

• https://support.mozilla.org/en-US/kb/firefox-protection-against-fingerprinting