centered tabs on tabbar

Centre les onglets sur la barre d'... onglets

in your userChrome.css
~/.mozilla/firefox/profile name/chrome/userChrome.css
(if it does not exist : create folder and file)

@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul");
/* ====== CENTERED TABS ====== */

.tabbrowser-tabs .scrollbox-innerbox
{
-moz-box-pack:center!important;
}

/* ===/// CENTERED TABS ====== */