Firefox does this. The red line/open lock means mixed secure/insecure content, and probably won't be preventable on DW where users can post content that originates from a non-secure connection (but in re-reading the comment after replying, I'm not sure that should happen on log-in though I do see it on Reading pages that have mixed content. So now I want to log out and log back in just to see if it happens for me there, too, since I can honestly say I've paid no attention before this).
ETA: Just logged out/logged back in from dreamwidth.org (using Firefox); green icons all the way. But I forgot you can log in/out from any page on DW with a navstrip which might explain a mixed content warning showing up after log-in (I use the navstrip so infrequently that I totally forgot we can do that.)
no subject
https://support.mozilla.org/t5/Protect-your-privacy/Mixed-content-blocking-in-Firefox/ta-p/10990
ETA: Just logged out/logged back in from dreamwidth.org (using Firefox); green icons all the way. But I forgot you can log in/out from any page on DW with a navstrip which might explain a mixed content warning showing up after log-in (I use the navstrip so infrequently that I totally forgot we can do that.)