Yeah it's something that is browser dependent. I wouldn't call it a bug, but it is an annoyance. It's a decision we had to make in order to keep Freeboards secure for customers who don't want their data to be seen. But it does require the API to be available in HTTPS as well.

It's something we'll have to fix— maybe an option to turn off SSL for the freeboard, or like you say, create a proxy.

We'll look into it and have a solution soon.