"This connection is not secure. Logins entered here could be compromised" warning

On my wife’s computer (Win 10, Firefox) she started getting this warning “This connection is not secure. Logins entered here could be compromised” for the Straight Dope MB this morning. Is there a problem with the SDMB? I haven’t seen this on other computers I use the SDMB on (at least not so far).

Previous thread.

No problem the SDMB hasn’t always had. SDMB apparently has never supported HTTPS, so your login has never been encrypted. It’s just now, the most recent version of Firefox complains about it.

Nothing’s changed except Firefox.

ETA: Moral of the story: never re-use passwords. Even though a bad actor capturing an unencrypted HTTP exchange in-flight is a pretty low likelihood, it’s not impossible. So consider your SDMB login to be expendable, and don’t use the same one elsewhere that actually matters.

Thank you (and good advice in general).

It is good advice. Several of my favorite places don’t use HTTPS and I suspect have no plans to do so. In light of that I’m very careful to use different passwords for each, pain in the arse though that may be. (Although to be honest I use unique passwords everywhere, HTTPS or no, so the foregoing isn’t really germane. Oh well.)