Here are some things to try when your web browser starts acting flaky, or just weird:
Reboot the thing – it’s not just a joke. Rebooting can fix a variety of ills.
Download and install the Edge browser [https://www.microsoft.com/en-us/edge]. See if your machine is still unhappy…. or download Firefox, Chrome, Opera, Vivaldi…. there are dozens of others. If the site works in a different browser but not your preferred one, that indicates something has gone wonky with just your browser.
Clear the cache in ALL of your current browsers
Firefox: https://support.mozilla.org/en-US/kb/how-clear-firefox-cache ]
Make sure Chrome and Firefox are updated
Firefox: https://support.mozilla.org/en-US/kb/update-firefox-latest-release ]
Make absolutely sure all of your Windows updates have been applied: https://www.laptopmag.com/articles/update-windows-10#:~:text=How%20to%20Update%20Windows%2010%201%20Select%20the,an%20available%20update%2C%20it%20will%20begin%20downloading%20automatically.