set strict_min_version to 140.0

Added a list of private Top Level Domains so that the extension does not check (e.g. .localhost)
Added a list of reserved IP addresses so that the extension does not check (e.g. 100.64.0.0/10)
Added an informative button on Options page about IDN
The extension now also checks the fingerprint of the issuer's certificate
Added error handling of malformed URLs to check
Added error handling for errors from check server API
Removed SHA-1 fingerprint usage
Removed hardcoded SHA256 of check server's certicate (cmh_sha256). If there is a MITM with a valid signature, checkMITM() won't return any error because the RSA-SHA256 signature verification would OK but the signed body response will still contain the (right) SHA256 of the requested's website certificate. Hence, that last hash will be different from the (wrong) SHA256 of the certificate on client side and CMH status will be invalid
Removed API query parameter 'sign'. Now, every request is signed, no need to specify this parameter
Renamed API query parameter 'host_raw' to 'host_ip'

5.7.1 - 2024-02-04
- Fix loading of options on browser startup (custom server and public key)
- Better error messages

## 5.6.0 - 2022-01-28
- Add IP getter and call API with it, in order to avoid false negatives
- Improved appearance of options

## 5.5.4 - 2022-01-08
- Certificate fingerprint update

- Add the option to disable notifications

- Fix the error message when the check server is down.

- Fix a bug preventing the error message when checking the check server.

- Fix SSL Pinning on Check Server.

- Support the WebExtension TLS API (the Python script is now optional on Firefox > 62).
- Back on Firefox Mobile!
- Improved tab management.

- Fix compatibility with Python 3.7.

- Add proxy support in Python script.
- Increase timeout to 10sec.

- Migration to WebExtension!
- Use a Python script to perform a check (pending the WebExtension TLS API).