I wanted to report a bug related to the website that requires a screenshot because it’s a UI bug. I am unable to do that. Whenever I start a file upload on this forum, I see this error in the JS console:
Security Error: Content at https://forum.exercism.org/c/exercism/bugs-and-features/126 may not load data from http://forum.exercism.org/javascripts/media-optimization-worker.js.
I can upload images fine and people do it all the time.
I don’t see that issue myself in the console. Very strange.
Hmm… after thinking about this again, I remembered that I installed a new privacy extension recently. Of course it is the new extension’s fault 
sorry for the noise. But maybe there is still something that could be fixed on the forum, to serve the script over https anyway?
Actually… I tried yet again, and now it doesn’t work again, even through I disabled all extensions 
I don’t understand where the problem is. Probably somewhere in my Firefox settings or new Firefox Dev Edition features.
I created my new thread via Chrome now where I could upload a screenshot, but that’s a bit annoying.
Can you test via Firefox Developer Edition to see if you can reproduce this error?
I’ve asked Aron to look 
I have seen such behaviour with mis-configured reverse proxies for caching. It happened to me when we had the TLS handshaking done by the proxy and internally forwarded HTTP only. The re-writing in the requests happened for GET only, but not for POST. In the end, we gave up on caching at the network level.
