Firefox is my web development platform, and I find that I often have to kill and restart it to test things, so I have the alias "kf" that kills my firefox.
alias kf='killall -9 firefox-bin'
The new update of firefox now gives me a dialog box asking to restore my session when I kill it, which wastes some time, and is almost never what I want to happen.
about:config to the rescue:
browser.sessionstore.resume_from_crash;false
