Solved

Car Livery not changing?

I tried to change my livery and I uploaded my changes and it doesn't change after reloading the page and waiting for a hour.

Take a day or two for it to change, but it will be changed already in the race viewer

Whenever I open Livery Editor it now shows my new livery but when I "Upload Changes" and go off it and reload it shows my old livery... (I did clear cache and keep the website open for 2 minutes)

I have the same problem... two days ago I have changed the livery, uploaded the changes more times, but it still doesn't work, either in the race or in the cars section.
Another problem that I encountered just this morning is that unity web player doesn't work anymore to me; now it tells me to install it, but I had already installed it and always worked until this morning, so I tried to reinstall it but still doesn't work. What's going on?

I think I know what it is....

Mozilla had said before they were going the same route as Chrome etc and blocking NPAPI plugins etc, maybe the latest release has taken this step :(

https://support.mozilla.org/t5/Videos-sound-pictures-and/Why-do-I-have-to-click-to-activate-plugins/ta-p/5122

"Support will end for all NPAPI plugins except for Flash in March 2017, when Firefox version 52 is released."