Zwariować można z tym zamykaczem z prawej strony. Poniżej zamieszczam kod, który umieści przycisk ‘Zamknij tab’ z lewej strony.
Zawartość kodu należy umieścić w katalogu ~/Library/Application Support/Firefox/Profiles/tutaj_nazwa_twojego_profilu/chrome w pliku o nazwie userChrome.css – dotyczy Firefox 4.
Działa także w Firefox 5 i Firefox 6.
Kod do wstawienia:
/** Do not remove the @namespace line -- it's required for correct functioning*/
@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul");
/* set default namespace to XUL */
/* move favicon, throbber and text to the right so that the close button appears on the left */
.tabbrowser-tab .tab-icon-image { -moz-box-ordinal-group: 2 !important;}
.tabbrowser-tab .tab-throbber { -moz-box-ordinal-group: 2 !important;}
.tabbrowser-tab .tab-label { -moz-box-ordinal-group: 3 !important;}
/* hide close button initially */
.tabbrowser-tab .tab-close-button { display: none !important;}
/* show close + hide throbber & favicon on hover */
.tabbrowser-tab:hover .tab-close-button { display: block !important;}
.tabbrowser-tab:hover .tab-icon-image { display: none !important;}
.tabbrowser-tab:hover .tab-throbber { display: none !important;}
/* app tabs should not behave like regular tabs, so let them stay normal (viz. don't show close on hover) */
.tabbrowser-tab[pinned]:hover .tab-close-button { display: none !important;}
.tabbrowser-tab[pinned]:hover .tab-icon-image { display: block !important;}







