FireFox does not support certain web sites.

[weedtech]

If you go to www.regions.com you get an error and Firefox reports "Internal Server Error". But if you access this web page on other browsers like Chrome, the page loads just fine. This has been going on for over a year now.

[siffemcon]

No problem here. See https://askleo.com/internal-server-error/. Have you contacted the webmaster?