.tab-line,
.titlebar-placeholder[type='pre-tabs'],
#alltabs-button {
    display: none !important;
}

.tabbrowser-tab[beforehovered]:after,
.tabbrowser-tab:hover:after,
.tabbrowser-tab[beforeselected-visible]:after,
last-visible-tab,
.tabbrowser-tab[last-visible-tab]:after,
.tabbrowser-tab[selected]:after,
.tabbrowser-tab[selected]:before {
    border-color: var(--secondary) !important;
}

.tabbrowser-tab:after {
    transform: scaleY(0.6) !important;
}

#main-window[sizemode='normal'] #new-tab-button {
    margin-top: 0px !important;
}

#main-window[sizemode='normal'] #tabbrowser-tabs {
    margin-top: 0px !important;
}

#new-tab-button {
    margin: 0px -2px 0 8px !important;
}

/* Background behind tabs */
#TabsToolbar
{
  -moz-appearance: none !important;
  background: var(--secondary) !important;
  color: inherit !important;
  padding-inline-end: 2px !important;
}

.tabbrowser-tab[selected='true'] .tab-background {
    background: var(--main) !important;
    color: var(--selected-fg) !important;
    min-height: 36px !important;
    z-index: 100 !important;
}

#tabbrowser-tabs {
    min-height: 36px !important;
    max-height: 36px !important;
    margin-bottom: 0 !important;
    padding-bottom: 0 !important;
    background: var(--secondary) !important;
    color: var(--unselected-fg) !important;
}

.arrowscrollbox-scrollbox {
    padding: 0 8px 0 8px !important;
    overflow: visible !important;
}

/* Tab curves */
.tabbrowser-tab .tab-background {
    height: 36px !important;
    border-radius: 8px 8px 0 0 !important;
    background: var(--secondary) !important;
    position: relative !important;
    -moz-transition: 10.25s filter ease-in-out;
}

.tab-background:before,
.tab-background:after {
    content: '';
    position: absolute;
    height: 8px;
    width: 20px;
    bottom: 0;
    z-index: 50 !important;
}

.tab-background:after {
    right: -20px;
    border-radius: 0 0 0 8px;
    box-shadow: -8px 0 0 0 var(--secondary);
}

.tab-background:before {
    left: -20px;
    border-radius: 0 0 8px 0;
    box-shadow: 8px 0 0 0 var(--secondary);
}

.tab-background[selected]:after {
    box-shadow: -8px 0 0 0 var(--main);
}

.tab-background[selected]:before {
    box-shadow: 8px 0 0 0 var(--main);
}

.tabbrowser-tab:not([selected]):hover .tab-background {
    filter: brightness(1.10) !important;
    /*background: var(--hover) !important;*/
    z-index: 100 !important;
}

.tabbrowser-tab:not(:hover):not([selected]) .tab-close-button {
    display: none !important;
}
/* no close button */
.tabbrowser-tab .tab-close-button {
    display: none !important;
}

/*no scrolling*/

.tabbrowser-tab {
    min-width: initial !important;
}
.tab-content {
    overflow: hidden !important;
}

/* No flash on load */

.tab-loading-burst {
    display: none !important;
}

/* greyscale icons in toolbar, not tabs*/
toolbar#PersonalToolbar > toolbaritem#personal-bookmarks toolbarbutton.bookmark-item .toolbarbutton-icon {
	filter: grayscale(100%);
}

/* favicons */
.tab-icon-image {
    /*Disable*/
    display: none !important;

    /*filter: grayscale(100%);*/
    /*filter: contrast(10%);*/
    /*filter: brightness(76%);*/

    /*Add backdrop*/
    /*With big enough padding, the favicon can be hidden*/
    /*background-color: var(--favicon-backdrop) !important;*/
    /*border-radius: 25%;*/
    /*padding: 8px;*/
}