hi, please give us more information about the error by clicking on the error code, copying the text to the clipboard and then pasting it here into a reply in the forum like shown in the screenshot.

thank you!

https://accounts.firefox.com/

Peer’s Certificate issuer is not recognized.

HTTP Strict Transport Security: true HTTP Public Key Pinning: true

Certificate chain:

MIIDpzCCAo+gAwIBAgIRAKknwrQO1Fqzopdz6C5vhZEwDQYJKoZIhvcNAQELBQAw KzELMAkGA1UEBhMCRU4xHDAaBgNVBAMME0FkZ3VhcmQgUGVyc29uYWwgQ0EwHhcN MTcwMjE0MDAwMDAwWhcNMjAwNTE0MTIwMDAwWjCBjzELMAkGA1UEBhMCVVMxEzAR BgNVBAgTCkNhbGlmb3JuaWExFjAUBgNVBAcTDU1vdW50YWluIFZpZXcxGzAZBgNV BAoTEk1vemlsbGEgRm91bmRhdGlvbjEXMBUGA1UECxMOQ2xvdWQgU2VydmljZXMx HTAbBgNVBAMTFGFjY291bnRzLmZpcmVmb3guY29tMIGfMA0GCSqGSIb3DQEBAQUA A4GNADCBiQKBgQDd9Je7Vxv1ILnLS4OIv/sgi+aVORpomLThtq9pDG0ntZrBJPmc 2diQVNrblRWdvl1MRSxP3uwyq9Kq/GD86/equF7m+oGOJ26VvTmnPPS6jjhR5SBz NfUSLwPNiQNtNCypy+uuCm668FWD0rFy7Hg/bU6V7zn4/LVQjba3nh0C8wIDAQAB o4HkMIHhMIGxBgNVHREEgakwgaaCFGFjY291bnRzLmZpcmVmb3guY29tghhhcGku YWNjb3VudHMuZmlyZWZveC5jb22CG3NjcnlwdC5hY2NvdW50cy5maXJlZm94LmNv bYIddmVyaWZpZXIuYWNjb3VudHMuZmlyZWZveC5jb22CGm9hdXRoLmFjY291bnRz LmZpcmVmb3guY29tghxwcm9maWxlLmFjY291bnRzLmZpcmVmb3guY29tMAwGA1Ud EwEB/wQCMAAwHQYDVR0lBBYwFAYIKwYBBQUHAwEGCCsGAQUFBwMCMA0GCSqGSIb3 DQEBCwUAA4IBAQBkYuTlQZnwFLNnRL10qyhVl+Flqm3eeE64OOa1w+1BW0lup3aE YBl3G4pLFY2iSIFRQMuAZdr/c0NM21NIyQnFugP4+QfaDIS+79oRUk3rq00F9VJu qQ/DTIKMcBtDy4TW7SCBz7lz0zWRIOrTT3YqzVfB4lj3rMVFxhwYTKV0/GYqkHM7 jTq+hbiSDflzBXkFnJJvwhWbDZkm53JIYS8L+2KVS2vsPLR7XJq53aeOr8rnzr4w VNHDed7T+wABkGnrgbouqeW/znZiDIPmYL1/FLAnRvdTcdjYoqWBxlFgO4IHl83T DvK2ViN3VHpRcnvdFwq88/aV3zRIbw5Sc08X

thank you. it appears like your secure connections are intercepted by adguard. please either uninstall that software from your device and use an integrated adblocker like https://addons.mozilla.org/firefox/addon/ublock-origin/ or see https://kb.adguard.com/en/windows/solving-problems/connection-not-trusted

Thank you. Disabling adblocker and then doing it worked.