i looked on Firefox proxy addons, but i cant find any which automatically use the fastest proxy (lowest ping/latency/speed) amongs list (one proxy url per line of user defined proxies.

Or the plugin that contains function to fetch proxies from user defined list of URLs (there are webpages that list public proxies, google: free updated proxy list) + filter only anonymous (google: how to detect anonymous proxy) proxies.

If user define proxy, some private proxies may require login, so this is another possible function to include


that would be nice if there is such handy proxy addon that can automatically extract new proxies from external defined urls and keep using fastest anonymous ones

when i login on some website, proxy switcher should give more weight to that proxy IP (tolerate lower latency) so im not logged out because my IP got changed.