Speed up firefox on Ubuntu

about:config

1. network.http.pipelining -> true
2. network.http.pipelining.maxrequests -> 8
3. network.http.proxy.pipelining -> true
4. network.dns.disableIPv6 -> true
5. plugin.expose_full_path -> true
6. Right click -> New -> Integer: nglayout.initialpaint.delay -> 0
7. Right click -> New -> Integer: content.notify.backoffcount -> 5
8. Right click -> New -> Boolean: content.notify.ontimer -> true
9. Right click -> New -> Integer: ui.submenuDelay -> 0
10. layout.spellcheckDefault -> 2
11. Right click -> New -> Integer: browser.cache.memory.capacity -> 16384
12. Right click -> New -> Integer: content.maxtextrun -> 5000
13. add-on : fasterfox

References:
http://www.ubuntugeek.com/speed-up-firefox-web-browser.html
http://fasterfox.mozdev.org
http://kb.mozillazine.org