grubbed from damanique

This one's important to people who are using Firefox 2.0 and are annoyed that there is now a red closing button on each tab instead of only one on the left. I know it annoyed the heck of out me.

To get back to the old situation, do this:

- type 'about:config' in your address bar and hit Enter. omg.
- where it says 'Filter', fill in: ' browser.tabs.closeButtons '.
- change the value from 1 to 3 by double clicking on it.