Firefox Questions..

Hi,

I hope this is the right place to post this question -- if it isn't my 
advance apologies.

I've just made the switch from Safari to Firefox, but I'm wondering if 
it's possible to duplicate a few Safari-like behaviours in Firefox?

For example, when I click on a link in my e-mail program, Safari would 
open the link in a new background tab.  Firefox opens the link in a new 
window.

Also, what is the key combination to move between tabs in Firefox? With 
Safari, it's Option-Shift-Arrow (right or left).

Thanks for any help!