It's possible that when you changed your location temporarily, your computer automatically set itself to an incorrect DNS setting. The Domain Name System (DNS) is the system that converts your website URL into the IP address of that website so that you don't have to.

You can try flushing your DNS cache, which will force your computer to recalculate all of your URLs. To do this, please try opening the Windows command prompt in administrator mode and enter ipconfig /flushdns. You can then close the command prompt and restart your system.

Since most of the internet settings are handled through your operating system, not specifically Firefox, you may want to contact the Microsoft support team for further assistance if flushing the DNS doesn't solve the issue.

Thank you, it seems to be working.

No problem. Glad that I was able to help you solve your problem.

It happens quite often to users that visit other countries and it usually impacts all browsers because Firefox uses your operating system's internet settings.

Thanks for contacting the Mozilla support team and feel free to get in touch again if you have any other issues with Firefox or our other products.