To + mi osobně dcl vadí, ale už jsem si zvykl.
No problemo.
Hide the new tab button in the tab bar
While most users (specially new ones) will appreciate the new tab button added to the tab bar, some may find it useless. You can make your Firefox look cleaner by removing it. Add the line below to your userChrome.css file (*):
.tabs-newtab-button {display: none;}
zdroj: http://mozillalinks.org/wp/2009/07/disable-tab-tea ring-and-six-other-firefox-3-5-tab-tweaks/