On Mon, 14 Apr 2025 16:10:47 -0700 (PDT)
Arabella Barks <[email protected]> wrote:

> The key issue is that the alternative path AIA doesn't function on
> Firefox. Please attempt to remove the AAA Certificate Services from
> your Firefox browser(to simulate what Ben and Mozilla's plan) and
> then refresh the page at https://www.relialabtest.com.
> Firefox will alert this website as insecure.

I'm not able to reproduce this with either Firefox 137.0.1 or Firefox 
128.9.0esr.

Although Firefox doesn't implement AIA, it does have Intermediate 
Preloading[1], which enables Firefox to build an alternative chain to another 
trust anchor.

Note it seems to take a brand new Firefox profile a few minutes to download the 
Intermediate Preloading data, during which time you do get a certificate error. 
 Could that potentially explain the error you got?

Regards,
Andrew

[1] 
https://blog.mozilla.org/security/2020/11/13/preloading-intermediate-ca-certificates-into-firefox/

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