Hi sven160, It shouldn't be the site - it loads fine here from the US. It could be caused by anti-virus software or a certificate issue - Websites don't load - troubleshoot and fix error messages https://support.mozilla.org/en-US/kb/websites-dont-load-troubleshoot-and-fix-errors Secure website certificate https://support.mozilla.org/en-US/kb/secure-website-certificate How to troubleshoot security error codes on secure websites https://support.mozilla.org/en-US/kb/error-codes-secure-websites How to troubleshoot time related errors on secure websites https://support.mozilla.org/en-US/kb/troubleshoot-time-errors-secure-websites