Ok, vielen Dank:
@namespace url(http://www.mozilla.org/keymaster/gate…ere.is.only.xul);
.bookmark-item[container], treechildren::-moz-tree-image(container) {
list-style-image: url('data:image/png;base64,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') !important;
}
treechildren::-moz-tree-image(container, OrganizerQuery_BookmarksToolbar) {
fill: black !important;
}
treechildren::-moz-tree-image(container, OrganizerQuery_BookmarksMenu) {
fill: black !important;
}
treechildren::-moz-tree-image(container, OrganizerQuery_UnfiledBookmarks) {
fill: black !important;
}
treechildren::-moz-tree-image(container, livemarks) {
list-style-image: url('data:image/png;base64,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') !important;
}
.bookmark-item[container][query], treechildren::-moz-tree-image(container, query) {
list-style-image: url('data:image/png;base64,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') !important;
}
#PersonalToolbar {
background-color: #DBEBFA !important;
}
tab [selected=true] * {
background-color: #DBEBFA !important;
}
tab:not([selected="true"]) {
background-color: #BFDCF7 !important;
border-left: 1px solid #9E9E9E !important;
}
.tabbrowser-tab .tab-label {
color: black !important;
}
.tab-close-button{
color: black !important;
}
.tabbrowser-tab:hover{
background-color: #A4BED9 !important;
}
#nav-bar {
background-color: #DBEBFA !important;
}
menubar, toolbar, nav-bar, #TabsToolbar > *{
background-color: #B9D1EA !important;
background-image: none !important;
}
#toolbar-menubar, #menubar-items, #main-menubar {
background-color: #B9D1EA !important;
background-image: none !important;
}
#main-menubar > menu {
color: black !important;
}
/* Statusleiste - Anpassung */
#statuspanel {
border:none! important;
margin-top:-9px !important;
}
#new-toolbar{
max-height:26px!important;
}
#new-toolbar {
border-top:1px solid grey!important;
}
#statuspanel-label{
border:none!important;
background:transparent!important;
color: black !important;
}
/* Weitere Lesezeichen anzeigen - Pfeil */
#PlacesChevron {
/*-moz-box-ordinal-group: 1 !important;*/
display: -moz-box !important;
list-style-image: /*url("data:image/gif;base64,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") !important;}*/
url("data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABsAAAAVCAMAAACAAGUXAAAAFXRFWHRDcmVhdGlvbiBUaW1lAAfiAxcXFy9/DOqVAAAAB3RJTUUH4gMYDiMI/7nH0AAAAAlwSFlzAAAOdAAADnQBaySz1gAAAAZQTFRF1uf3AAAA4EVzLAAAAAF0Uk5TAEDm2GYAAAAhSURBVHjaY2AYeMDIiE9uYCUZsQBi5EiwkJ5SeMOaUgAAUYgASwiGVGsAAAAASUVORK5CYII=") !important;}
/* Zeigt einen neuen New Tab Button
#new-tab-button,
.tabs-newtab-button {
list-style-image: url("newtab.png") !important;
-moz-image-region: auto !important;
}*/
/* Den Balken von Suchmaschinen ausblenden */
#urlbar-results,
#urlbar:not(.megabar) .search-one-offs {
display: none !important;
}