如果不安装stylish，可以用到以下代码吗？

如果不安装stylish，可以用到以下代码吗？可以的话，放入哪里呢？UserContent.css？userChrome.css？
代码来源：http://userstyles.org/styles/43235/firefox-4-addonbar-in-a-corner

@namespace url(http://www.mozilla.org/keymaster/gateke ... s.only.xul);

#browser-bottombox {
position: fixed;
width: auto;
bottom: 0px;
padding-right: 5px;
padding-left: 5px;
padding-top: 1px;
background: -moz-Dialog;
border: 1px solid transparent;
-moz-transition: all 0.25s ease;
}

@media all and (-moz-windows-theme:aero) {

#browser-bottombox:not(:-moz-lwtheme) {
background: hsl(214,44%,87%)!important;
}

}


/* Opacity */
#browser-bottombox {
opacity: 0.4;
}

#browser-bottombox:hover {
opacity: 1 !important;
}


/* Slide effect */
/**/

/* Side */
#browser-bottombox {
right: 0px;
-moz-border-radius: 7px 0 0 0;
background-position: right bottom !important;
border-bottom: none;
border-right: none;
}

#addon-bar > #status-bar > .statusbar-resizerpanel {
position: relative;
margin-right:-4px;
}

#FindToolbar {
position: fixed !important;
border: 1px solid transparent;
border-top: none;
border-radius: 7px 7px 7px 7px;
background: inherit;
bottom:34px;
right:50px;
background-position: 78% -40px;
}

.statuspanel-label {
border-bottom-left-radius: 3.3px;
border-bottom: 1px solid rgb(204, 204, 204) !important;
}

statuspanel:-moz-locale-dir(ltr)[mirror],
statuspanel:-moz-locale-dir(rtl):not([mirror]) {
bottom: 22px;
}

/* Borders */
#browser-bottombox, #FindToolbar {
border-color: -moz-ButtonDefault;
}

@media all and (-moz-windows-theme:aero) {

#browser-bottombox, #FindToolbar {
border-color: rgba(10%,10%,10%,.4);
}

}

/* Everything else */

#addonbar-closebutton {display: none !important;}

@media all and (-moz-windows-theme:luna-blue),(-moz-windows-theme:luna-silver),(-moz-windows-theme:luna-olive),(-moz-windows-theme:zune),(-moz-windows-theme:royale),(-moz-windows-theme:aero),(-moz-windows-classic) {

#addon-bar {
-moz-appearance: menuitem !important;
}

}

#main-window:-moz-lwtheme #FindToolbar {
border-top: none!important;
}

#main-window #tab-view-deck #navigator-toolbox[customizing="true"] ~ #browser-bottombox {
width: auto !important;
bottom: 0px !important;
padding-right: 5px !important;
padding-left: 5px !important;
opacity: 1 !important;
}

#main-window #tab-view-deck #navigator-toolbox[customizing="true"] ~ #browser-bottombox > #addon-bar {
visibility: visible !important;
}

#addon-bar[collapsed="true"] {
display:none !important;
}