If you have chosen fixed server proxy mode, then as per my opinion you can easily specify further options in 'URL of proxy server' only the HTTP proxy server with the highest priority is available for ARC-apps. If you are facing an issue in Google Chrome like browser ERR_CACHE_MISS issue then I recommend connecting with Chrome support experts.
I use Google Chrome all the time. I am facing many errors in it. But every problem has its own solution. Since yesterday, I am facing err_cache_miss message. I am unable to find a solution. Plz, share the solution if any.