In Firefox:
You have asked Nightly to connect securely to download.muidev.de, but we can't confirm that your connection is secure.
Normally, when you try to connect securely, sites will present trusted identification to prove that you are going to the right place. However, this site's identity can't be verified.
What Should I Do?
If you usually connect to this site without problems, this error could mean that someone is trying to impersonate the site, and you shouldn't continue.
This site uses HTTP Strict Transport Security (HSTS) to specify that Nightly only connect to it securely. As a result, it is not possible to add an exception for this certificate.
Technical details:
download.muidev.de uses an invalid security certificate.
The certificate is only valid for the following names:
http://www.light-speed.de, light-speed.de, *.light-speed.de
(Error code: ssl_error_bad_cert_domain)
Not to mention, when I connect with another browser I cannot find MUI in the downloads.
