Does it work in any different browser?

The first search result I get for that site is a different address.

Does it work in any different browser?

Not on laptop though, but on mobile it works...

Did you try doing a Google search for the website?

It works for me. see screenshot Try to Clear all items for a single site. https://support.mozilla.org/en-US/kb/remove-websites-address-bar-suggestions Did you try Firefox in Troubleshoot Mode? What security software are you running? Who are you using for DNS? If Windows Pro version, try testing in Windows Sandbox (VM) to see if you have the same issue. https://www.howtogeek.com/399290/how-to-use-windows-10s-new-sandbox-to-safely-test-apps/

What do you get when you ping the site?