This is appearing with the latest version of Firefox and Chrome. Is their any setting or fix I can apply to Firefox to suppress this message?
Sure thing, check the FAQ for the answer at http://www.newsblur.com/faq:
- What does “imperfect proxy due to http over https” mean?
- This refers to when the Story view in NewsBlur is not able to load a thing for many users who are reading NewsBlur over an https connection. See the NewsBlur Blog post entitled A new way to use the Story view while on https (SSL) for details.