hello, as a first troubleshooting step please try to [[Clear the cache - Delete temporary Internet files to fix common website issues|clear the cache]] & [[Delete cookies to remove the information websites have stored on your computer|cookies from nhl.com]] and reload the page.

You can also try to reload web page(s) and bypass the cache to refresh possibly outdated or corrupted files. *Press and hold Shift and left-click the Reload button. *Press "Ctrl + F5" or press "Ctrl + Shift + R" (Windows,Linux) *Press "Command + Shift + R" (MAC) Start Firefox in <u>[[Safe Mode|Safe Mode]]</u> to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance). *Do NOT click the Reset button on the Safe Mode start window or otherwise make changes. *https://support.mozilla.org/kb/Safe+Mode *https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes