Are there issues with any other secure sites, such as this support site?

I'm assuming you posted with Google Chrome. Does it access Google.com and YouTube.com without problems -- only all other browsers are affected?

In case you haven't seen this article yet: Secure connection failed and Firefox did not connect. Does anything there help?

Google was working on chrome up until like 5 minutes ago which is pretty weird.

as far as I know there aren't any issues with other secure sites.

though oddly enough mozilla.org shows up as only unformatted text on my firefox.

none of the fixes in that article work.

While you are on mozilla.org, could you check the certificate? Click the padlock (or warning triangle) in the address bar, then More Information, then View Certificate. I'm interested in the "Issued by" and "Certificate Hierarchy". I've attached what I see for reference. What do you have there?

Edit: To clarify, that is from https://support.mozilla.org/ and not https://www.mozilla.org/

there's a padlock, the issued by and certificate hierarchies are identical to yours.

for some inexplicable reason chrome isn't allowing me to upload images.

not sure if this'll help but when I click the padlock on google.com, google says:

Owner: This website does not supply ownership information. Verified by: not specified

burnt said

not sure if this'll help but when I click the padlock on google.com, google says:

Owner: This website does not supply ownership information.
Verified by: not specified

I think "not specified" appears when the page contains "mixed content" but in that case usually you wouldn't have a padlock, so that is strange.

On this site, you're saying that you see the basic page content but it is unstylized? Could you check whether you can load either of these files or whether they are blocked (in Chrome and/or Firefox):

• https://support.cdn.mozilla.net/static/build/common-min.b9c094108370.css
• https://mozorg.cdn.mozilla.net/media/css/tabzilla-min.css

Note that a successful load will present a simple wall of text consisting of innumerable style rules. If those load, and you return to this site and reload, do the styles get applied?

I miswrote, there is no padlock, there's only a globe.

When I try to connect to either of those pages on firefox I get the same error as google

oh man facebook stopped working too.

Sorry for the delay, long day away.

With this many cross-browser issues, can you confirm that your system clock date, time, and time zone are all correct? SSL validity checks are time sensitive.

If you only see a globe, I think you might not using an HTTPS address. Usually Firefox displays either a padlock or a "!" triangle icon on an HTTPS address depending on whether the certificate checks out or has a problem.

In the error page, is there a code in parentheses, separated by underscore characters? If so, could you copy/paste that code.