When visiting https://data.stackexchange.com/stackoverflow/query/edit/200561, firefox tells me that not all parts of the page are secured.
Looking from source, f.ex. following things are not using https
IconUrl: 'http://sstatic.net/stackoverflow/img/icon-16.png' <img class="site-icon" src="http://sstatic.net/stackoverflowmeta/img/icon-16.png" alt="Meta Stack Overflow" /> <img src="http://sstatic.net/img/progress-dots.gif" alt="loading" /> Hold tight while we fetch your results
Also nearly all navigation links go to http site instead of https, transitioning user back to insecure connection.
Perhaps these could be addressed?