List of best mirrors for IP address 3.144.20.66, located in an unknown country.
I am very sorry, but no mirror was found. Feel free to download directly:
http://mirrordirector-mb.raspbian.org/raspbian/pool/main/f/firefox-esr/firefox-esr-l10n-cs_102.15.1esr-1~deb11u1+rpi1_all.deb