Enable Pipelining
Usually browser works by sending a request to the server and waits for a response before proceeding. Pipelining is a more aggressive technique that enables browsers to send multiple requests at once before receiving any response to reduce the time required to download the contents page. To enable this function type "about: config " in the box address, click twice on "network.http.pipelining 'and " network.http.proxy.pipelining' to change its value to "true" then double-click on "Network. http.pipelining.maxrequest "and make its value" 8 ".
Keep in mind that some servers do not serve pipelining. So, there is the possibility that this arrangement actually worsen the performance. Set back all of like the initial setup if problems occur.