userChrome.css

@import url("tabsOnBottom.css");
@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"); /* only needed once */

#main-menubar, #titlebar, toolbar {
   font-size: 20px !important;
   font-weight: 500 !important;
}

#alltabs-button {
    display: none !important;
}

#unified-extensions-button, #menu_openFirefoxView {
    display: none !important;
}


.searchbar-textbox, #urlbar {
    border-radius: 20px !important;
}

#urlbar-go-button { visibility: visible !important; }

#menu_importFromAnotherBrowser, #menu_sendLink, #menu_newNavigatorTab, #menu_newNavigator, #menu_openFile, #goOfflineMenuitem, #menu_openApps, #sync-setup, #menu_openTour { display:none !important; }

.autocomplete-history-dropmarker { display: none !important; }

#whats-new-menu-button, #reader-mode-button, #readinglist-addremove-button { display:none !important; }

#pageActionButton, #star-button-box {
     display: none !important;
}
#PanelUI-menu-button {
     display: none !important;
}

.openintabs-menuitem, .bookmarks-actions-menuseparator, .urlbar-history-dropmarker { display: none !important; }

#context-pocket, #context-sep-sendpagetodevice, #context-sendpagetodevice { display: none !important; }

#context-openlink, #context-openlinkprivate, #context-bookmarklink, #context-sendlinktodevice, #context-savelinktopocket, #context-sep-sendlinktodevice, #context-sendimage, #context-copyimage, #context-copyimage-contents { display: none !important; }


#tabs-newtab-button { display: none !important }

#TabsToolbar #firefox-view-button[open] > .toolbarbutton-icon:-moz-lwtheme, #tabbrowser-tabs:not([movingtab]) > #tabbrowser-arrowscrollbox > .tabbrowser-tab > .tab-stack > .tab-background:is([selected], [multiselected]):-moz-lwtheme {
     font-weight: 900 !important;
     color: white !important;
     background-image: none !important;
     background-color: #55A32A !important;
     border-top-left-radius: 7px !important;
     border-top-right-radius:  7px !important;
}

.tab-line[selected="true"] {
     background-color : black !important;
}

.tabbrowser-tab[selected]{
     background-image: none !important;
     background-color: #55A32A !important;
     font-weight: 900 !important;
     color: white !important;
     border-top-left-radius: 7px !important;
     border-top-right-radius:  7px !important;
}

.tabbrowser-tab[selected] .close-icon {
     color: white !important;
}


.tab-background[selected] {
     background-color: #55A32A !important;
}

.tabbrowser-tab {
     height: 45px !important;
}