Now the ISRG Root is trusted by Microsoft, Google, Apple, Mozilla, Oracle, and Blackberry:
But SSL Server Test: valid-isrgrootx1.letsencrypt.org (Powered by Qualys SSL Labs) says "Not trusted" for Windows and Apple for the certificate path to the ISRG Root.
Edit: apparently the DEV version of SSL Labs works as expected: SSL Server Test: valid-isrgrootx1.letsencrypt.org (Powered by Qualys SSL Labs)
The "Certification Paths" should always display Mozilla/Apple/Android/Java/Windows (and not only when the section is expended) with an indication if there is:
- Green: At least trusted path
- Orange: At least trusted path but with an extra download
- Red: No trusted path