I have a strange bug in Firefox, that was detected when site moved to SSL. There is single page site built on Backbone. When page with video tag loaded SSL indicator disappears. Firebug shows that Firefox create GET request connection to the server but it hangs. All site logic work correctly. And video on this page works perfect, I can click play and new connection will be created and video played but first connection still hangs. There is four page with video tag (four steps of wizard) and hanged connection appears randomly on this pages. Actually this issue exists without SSL, but detected only when we moved to SSL and lock icon began to disappear.