Mozilla Apparently Mis-identifies HTTPS Sites and Restricts Access?

[jeffhill]

I often get a link to a site embedded in my email that I want to go to. When I click on it I get a big notice that the site doesn't support HTTPS and Firefox won't let me go there. HOWEVER, the full address of the site is seen in the address bar, with HTTPS:// as plain as day. If I bypass the Firefox warning and go there anyway, it makes an HTTPS connection. If I go there with another browser it makes an HTTPS connection.

Why is Firefox wrongly identifying these sites as not supporting HTTPS?

[SithDad]

I get the same thing when I try to go to my companies Sharepoint site or any links saved as book marks to the sharepoint site.

Hmm. We’re having trouble finding that site.

We can’t connect to the server at xxxxxxxxx.sharepoint.com.

If you entered the right address, you can:

Try again later
Check your network connection
Check that Firefox has permission to access the web (you might be connected but behind a firewall)

Chrome still works fine and any other site in firefox works as well.

This happened after firefox updated and installing aWindows OS update -

2023-09 Cumulative Update Preview for Windows 11 Version 22H2 for x64-based Systems (KB5030310)

Maybe Microsoft broke it, wouldn't be the first time.

Hopefully Mozilla puts another update out fast to fix it.