Hello

A report.

Troubleshoot security error codes on secure websites. https://support.mozilla.org/en-US/kb/error-codes-secure-websites

If the error occurs on one site only, test it using SSL Labs https://www.ssllabs.com/ssltest

https://www.ssllabs.com/ssltest/analyze.html?d=www.temu.com

https://www.ssllabs.com/ssltest/analyze.html?d=www.temu.com&s=20.157.93.108 Overall Rating B

Trusted Yes Mozilla Apple Android Java Windows

https://www.ssllabs.com/ssltest/analyze.html?d=www.temu.com&s=20.33.69.37 Overall Rating B

Trusted Yes Mozilla Apple Android Java Windows

It does not stop firefox.exe to attempt to establish a connection with temu.com

Hello

A working environment (user) in a given situation does not correspond to a working environment (other user) in a given situation, please understand that it is difficult to give an opinion.

Have you asked the opinion of the technical support, or, the opinion of the community forum, of your anti-virus provider.

I have asked the opinion of the technical support.

Don't blame my antivirus ! It's only protecting my PC from a spam that firefox.exe sends me 30 to 100 times per day for the last 6 months.

Can you please stop it ?

Is that expired certificate attached there? Can you paste it here?