How can I reload 3.6 on my pc, I don't like v. 4.0

Question

I recently upgrade to Firefox 4.0 from 3.6 but would like to delete 4.0 and go back to 3.6. Not pleased with the changed format.

Answer 1

1. Lost the add on that worked with my Kaspersky Internet Security
2. Lost the ability to have my Hotmail IDs stored so I don't have to type them in each time I try to access accounts. (Apparently the same happens on other websites where I was "remembered" or recognized and had my ID and password filled in automatically. Now I have to manually go to my password lists and type in each one.)
3. When we right click to open a new tab, whose bright idea was it to switch the "new tab" option with the "new window" option so what has been an automatic movement of the cursor now opens dozens of unwanted windows?
4. Layout of the page is cumbersome - I don't want the Google bar up there at all but if I delete it, I lose the icons for refreshing the page, surfing back and forward, and accessing my home page. If I leave that up there, the top inch and a half on my laptop is toolbars and tab titles.
ALL IN ALL, FIREFOX 3 WORKED GREAT JUST NEEDED SOME TWEAKING OF THE FUNDAMENTALS (LIKE NOT CRASHING) WITHOUT ALL THIS COSMETIC CHANGE AND WITHOUT ROBBING US OF THE CONVENIENCES VERSION 3 OFFERED WHILE ADDING OTHERS.