Type about:config at address bar, then press enter button...
this is a list of firefox's configuration..
we also can make Firefox Faster.


Code:
true / false = boolean
0-99999 = integer



Code:
browser.tabs.showSingleWindowModePrefs = true
network.http.max-connections = 64
network.http.max-connections-per-server = 20
network.http.max-persistent-connections-per-proxy = 10
network.http.max-persistent-connections-per-server = 4
network.http.pipelining = true
network.http.pipelining.maxrequests = 100
network.http.proxy.pipelining = true
network.http.request.timeout = 300
network.http.request.max-start-delay = 0

Optional:
Code:
network.http.max-persistent-connections-per-proxy = 10
network.http.proxy.pipelining = true
network.http.proxy.version = 1.0

after that, reload page or press F5 button...


type about:config (then enter)
Network.dns.disableIPv6 = true





increase speed render. left click > new integer
nglayout.initialpaint.delay = 0



browser.xul.error_pages.enabled = true

Tweak maksimal connections dan downloads (for broadband):

network.http.max-connections = 4
network.http.max-connections-per-server = 16
network.http.max-persistent-connections-per-proxy = 16
network.http.max-persistent-connections-per-server = 10