Disallowing accessabilty access fixed problems for 57 which initially made firefox unuseable and eventually even full computer. Today Firefox upgraded to 57.0.1 and all problems are back. https://sourceforge.net/speedtest/ shows upload and DL speeds are decreased about 20%, but the real kickers are latency which increases about 10 to 100fold, from 16ms to 223 and then 1236ms, and packet loss consistently at 4 to 10%. After left open a while the firefox processes use up 100% of disk resources and whole computer becomes unuseable. Quitting and restarting firefox improve this but even at fresh restart, speedtest shows these awful latency and packet loss results immediately. Quitting firefox and same speedtest w Chrome I get latency 26ms, packet loss 0%, DL and UL about 20% faster. I reposted this on a few similar threads regarding the 57 problems but have been told to start a new thread. I am running Win8 and this is strictly a problem with firefox, no other apps, browsers etc. Since UL and DL speeds are still not bad I think the consistent very high packet loss, plus the numerous firefox processes which increase system resource use after perhaps a few hours to 100%, are current main problems.