Accesskeys:
I use access-key to follow links and send forms very often, and in Firefox 1.5 y default they were used by pressing "Alt"+"Accesskey". In Firefox 2.0 the default value has changed, so to follow accesskeys you many press: "Alt"+"Shift"+"Accesskey" wich is more complicated.
To change Firefox 2's behaviour, browse: "about:config" and set the value of the following keys to:
ui.key.chromeAccess = 5
ui.key.contentAccess = 4
This way the menu bar accesskeys are associated to the combination "Alt"+"Shift", and the accesskeys are associated to "Alt".
Close tab button
Maybe you prefer the old style for thec lose tab button or maybe you just want to try new ones. If you want to change the behaviour of this button browse "about:config" and set the value of browser.tabs.closeButtons to:
0 -> if you want the close tab button to appear only in the active tab.
1 -> if you want it to appear on every tab (default for Firefox2.0)
2 -> if you don't want to see the close tab button any more (middle click to close tab)
3 -> if you preffer the old style close tab button on the right of the tabs bar.
Personally I preffer option "0", or "3". Option "2" is not comfortable when using a laptop with a touch pad. And for me option "2" is just the worst, it makes you close tabs accedentally when trying to focus them... it's realy anoying.
PD: Excuse me for my english, I hope you find this useful.

