Firefox is one of the reasons which makes youtube streaming slow..
So we are gonna modify it to stream fast.. Actually firefox backsup contents and tabs in every 10 seconds.....Which makes youtube streaming slow...And irritating....It sucks in every 3 seconds and all...
So lets start...
1. Type about:config in the address bar
it will give you warning but dont worry its safe and reverseable..
So continue...
2. Now search for browser.sessionstore.interval
now double click on it...And change 10000 to 120000
now go to youtube and try to stream....
Streaming will become more smooth...Than before..