What security software are you running? Do yo have the same issue under a different Windows account? Did you try Windows in Safe Mode with networking? Did clearing the browser cache help?

That page loads without any apparent issue in my browser. Creating a new profile is a quick way of testing whether the issue is caused by your profile or software. https://support.mozilla.org/en-US/kb/diagnose-firefox-issues-using-troubleshoot-mode#w_the-problem-happens-in-21troubleshoot-modesf22safe-modesf https://support.mozilla.org/en-US/kb/troubleshoot-extensions-themes-to-fix-problems (also deals with hardware acceleration) https://support.mozilla.org/en-US/kb/profile-manager-create-remove-switch-firefox-profiles If you have visited the site previously, you could try removing cookies and site data and clearing the cache. https://support.mozilla.org/en-US/kb/clear-cookies-and-site-data-firefox https://support.mozilla.org/en-US/kb/how-clear-firefox-cache