Hi troothteller, what kind of popup is it? Is it related to saving your login, or something else?

If you are getting the orange page pushing a .js download, that is a malware distribution site and not a Mozilla site. The redirects leading t those pages seem to be distributed through advertising networks, so if you are not already using an ad blocking add-on, this might be the time to consider one. For example: https://addons.mozilla.org/firefox/addon/ublock-origin/

See also:

• I found a fake Firefox update
• Troubleshoot Firefox issues caused by malware

The site has nothing to do with Mozilla; so the user should be able to use any browser. It is a legitimate site to which I subscribe. The popup is Mozilla's usual, annoying one that you seem to know about, asking whether or not to save login information which I never do.

If you never save login information, you can disable that feature on the Options page (I do that myself). It's on the Security panel:

"3-bar" menu button (or Tools menu) > Options

In the left column, click Security. Then on the right side, clear the checkbox for "Remember logins for sites" and that should take care of it.

More info on this feature: Password Manager - Remember, delete and edit logins and passwords in Firefox

Does that work?

Thank you. I did as you suggested; but over time I will be able to see whether it works. Thanks again.