Ne yaptığımıda bilmiyorum ama yaptım bir kaçını 
Güzelde hızlandı gibime geldi :++:Reduce the amount of RAM Firefox uses for its cache feature 1. Type “
about:config” (no quotes) in the adress bar in the browser.
2. Find
“browser.sessionhistory.max_total_viewer”
3. Set it’s value to “
0“;(Zero)
Increase the Speed at Which Firefox loads pages 1. Type “
about:config” into the address bar and hit Enter.
(Normally the browser will make one request to a web page at a time. When you enable
pipelining it will make several at once,
which really speeds up page loading.) 2. Alter the entries as follows:
Set “
network.http.pipelining” to “
true”
Set “
network.http.proxy.pipelining” to “
true”
Set “
network.http.pipelining.maxrequests” to some number like
10.
Set “
network.http.pipelining.maxrequests” to some number like
8. (
Elucidated for Sietze)
This means it will make
8 requests at once.
3. Lastly, right-click anywhere and select
New-> Integer. Name it “
nglayout.initialpaint.delay” and set its value to “
0“;.(Zero)
This value is the amount of time the browser waits before it acts on information it receives. If you’re using a broadband connection you’ll load pages faster now.
Optionally (for even faster web browsing) here are some more options for your
about:config (you might have to create some of these entries by Right Click –> New– > Interger or String
network.dns.disableIPv6: set “false” “
content.notify.backoffcount”: set “
5“; (Five)
“
plugin.expose_full_path”: set “
true”.
“
ui.submenuDelay”: set “
0; (zero)
Reduce RAM usage to 10MB when Firefox is minimized: This little hack will
drop Firefox’s RAM usage down to 10 Mb when minimized: 1. Open Firefox and go to the Address Bar. Type in
about:config and then press
Enter.
2. Right Click in the page and select
New -> Boolean.
3. In the box that pops up enter
“config.trim_on_minimize”. Press Enter.
4. Now select
True and then press
Enter.
5. Restart Firefox.