TLSA

[James-E-A]

Why not, anyway?

[James-E-A]

https://www.dnssec-validator.cz/

We're sorry but [DNSSEC/TLSA Validator by CZ.NIC] is no loger actively developped and supported. It was getting excessively difficult to cope with the changes in web browsers and other required software to maintain the functionality in all of the previously supported browsers. Currently we don't know about any mainstream browser that would provide APIs which are necessary for the full functionality of the extension (as it was in Firefox 56 and its earlier versions).

[DNSSEC/TLSA Validator by CZ.NIC] is not available for Firefox 57 and above. Firefox 57 dropped the support for various APIs, which the add-on has been using, without providing adequate replacement. As we don't want to sacrifice any of the currently provided functionality we've decided to stop the support and development of the add-on.