When using Firefox, in addition to using add-ons, you can also improve the browsing speed of Firefox through the following settings:
A\ In the address bar, type "about:config" to open a detailed list of parameter command lines.
B\ In the list, find "network.http.pipelining" (pressing the key "n" can quickly locate to network.), double-click "network.http.pipelining", and change its value to "true" (double-click will automatically set it to true).