Another things: Caching. Before AO switched to HTTPS I could do the following thing: If an image didn't load (completely) I opened it in an extra tab (only the image) and did a hard reload / refresh. After that I reloaded the thread page and - tatatataaa - the image was there (completely) without being loaded a 2nd time. Now it doesn't matter if I do that. My browser tries to load the image again if I refresh the thread page. I assume that it doesn't get the necessary information from the proxy for doing the caching. As it doesn't reload the images in the thread which have been already loaded I guess the browser has some best effort strategy which doesn't work for the image in the extra tab. BTW: I use the current Firefox version.