Github connection is not secure

Describes the cause and action for error messages.

Error Message(English)：
connection is not secure

Resolution

Your connection is not secure | Firefox Support Forum | Mozilla ...
https://support.mozilla.org/questions/1223163

open https web failed by "Your connection is not secure" - GitHub
https://github.com/mozilla/geckodriver/issues/428

weakCrypto* まわりの訳の修正 ・ Issue #44 ・ mozilla-japan ... - GitHub
https://github.com/mozilla-japan/gecko-l10n/issues/44

Your connection is not secure ・ Issue #648 ・ mozilla/geckodriver ・ GitHub
https://github.com/mozilla/geckodriver/issues/648

Why chrome says https connection is not secure ・ Issue #135 ... - GitHub
https://github.com/shadowsocks/shadowsocks-windows/issues/135

Certification error "Your connection is not secure" ・ Issue ... - GitHub
https://github.com/mozilla/geckodriver/issues/216

Connection not secure ・ Issue #14 ・ openmotics/frontend ・ GitHub
https://github.com/openmotics/frontend/issues/14

tls - Why is Firefox (and only Firefox) reporting that my ...
https://security.stackexchange.com/questions/165649/why-is-firefox-and-only-firefox-reporting-that-m・・・

Firefox Error: "Your connection is not secure" while launching ...
https://stackoverflow.com/questions/40467460/firefox-error-your-connection-is-not-secure-while-launc・・・