To try the thousands of add-ons available here, download Mozilla Firefox, a fast, free way to surf the Web!Close
Welcome to Firefox Add-ons.
Choose from thousands of extra features and styles to make Firefox your own.Close
About this Add-on
During the browser start up, a first test will be made on our website (checkmyhttps).
What about my privacy?
The extension needs those parameters to our server.
[+] URL of an HTTPS website
[+] SHA1/SHA256 fingerprint of the server certificate chosen by the extension.
We gave the possibility to be free concerning the HTTPS website to check.
More detail !
Normally, a secured website has to prove its identity to your browser by sending a certificate validated by a recognized certificate authority. Interception techniques, to be able to work, generate dynamically forged certificates.
CheckMyHTTPS checks that the received certificate from a visited HTTPS website matches the certificate seen by a remote server, ensuring no interception is taking place within your local network. This is sufficient to prove the interception.