Make sure you are not blocking content. [https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-mode Start Firefox in Safe Mode] {web link} A small dialog should appear. Click '''Start In Safe Mode''' (not Refresh). Is the problem still there? --------------- https://support.mozilla.org/en-US/kb/enhanced-tracking-protection-firefox-desktop Many site issues can be caused by corrupt cookies or cache. '''Warning ! ! ''' This will log you out of sites you're logged in to. You may also lose any settings for that website. * [https://support.mozilla.org/en-US/kb/delete-cookies-remove-info-websites-stored Delete cookies to remove the information websites have stored on your computer] {web link} * [https://support.mozilla.org/en-US/kb/how-clear-firefox-cache How to clear the Firefox cache] {web link}acking-protection-firefox-desktop

Did you make sure that Windows and all drivers including the display driver have been updated to the latest version ? Boot the computer in Windows Safe Mode with network support to see if that has effect. *https://www.bleepingcomputer.com/tutorials/how-to-start-windows-in-safe-mode/ *https://www.7tutorials.com/4-ways-boot-safe-mode-windows-10

Thanks for your help. I have decided to return the computer. A 2 day old computer should work correctly.