Firefox UserCSS

#context-back image,
#context-forward image,
#context-reload image,
#context-stop image,
#context-bookmarkpage image,
#context-navigation,
#context-sep-navigation {
    display:none !important;
}

/* New Tab Context - move the menu item to the top */
#tabContextMenu menuitem[label="New Tab"] { -moz-box-ordinal-group: 0 !important; }
/* New Tab Context - hide the icon */
#tabContextMenu menuitem[label="New Tab"] .menu-iconic-icon { display: none !important; }


/* Firefox userChrome.css */
@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul");
.tab-throbber {
list-style-image: url("chrome://mozapps/skin/places/defaultFavicon.png") !important;
}

/* Remove Tab Throbber Animation, from this author : https://www.reddit.com/r/firefox/comments/7cvzkq/how_can_i_remove_firefox_57_page_load_animation/ */
.tab-throbber { display: none !important; }
.tab-icon-image { visibility: show !important; display: block !important;}
.tabbrowser-tab[progress="true"] .tab-icon-image {opacity:0.45; filter: blur(1px);}
.tab-loading-burst[bursting]::before {
background-image: none !important;
animation: unset !important;
}

@namespace url(http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul);
* { transition: none !important;
animation-duration: 0s !important; }

/* Close the useless Tab Bar Full, animate New Tab, from this author : http://forums.mozillazine.org/viewtopic.php?f=38&t=2282765 */
.tabbrowser-tab:not([pinned]) {
max-width: 250px !important;
min-width: 100px !important;
}
.tabbrowser-tab:not([pinned]):not([fadein]) {
max-width: 0.1px !important;
}
.closing-tabs-spacer {
width: 0 !important;
}

/* Remove the Ugly Distracting Transparent Tab effect, from this author : https://support.mozilla.org/en-US/questions/1187357#answer-1033293 */
#tabbrowser-tabs > .tabbrowser-tab > .tab-stack > .tab-background * {
    background: none !important;
}

/* Disable the Ugly Blue Glow Tab Effect, from this author : https://support.mozilla.org/en-US/questions/928081 */
.tabbrowser-tab[pinned][titlechanged]:not([selected="true"]) {
 background: -moz-linear-gradient(hsla(0,0%,100%,.2), hsla(0,0%,45%,.2) 2px, hsla(0,0%,32%,.2) 80%)
!important;
}
.tabbrowser-tab[pinned][titlechanged]:not([selected="true"]):hover {
  background-image: -moz-linear-gradient(hsla(0,0%,100%,.6), hsla(0,0%,100%,.2) 4px, hsla(0,0%,75%,.2) 80%) !important;
}

/* Disable the Tab Highlighting Fearure (absoluetly Useless for a normal use), from this author : http://forums.mozillazine.org/viewtopic.php?f=19&t=867225 */
.tabbrowser-tab:not([selected="true"]) > .tab-image-middle {
  background-image: url("chrome://global/skin/icons/tab-middle-bkgnd.png") !important;
}
.tabbrowser-tab:hover:not([selected="true"]) > .tab-image-middle {
  background-image: url("chrome://global/skin/icons/tab-middle-bkgnd.png") !important;
}

/* Remove some Random Annoying Animations in the Toolbar, from this author :  annoying animations https://www.reddit.com/r/firefox/comments/37hw8o/how_to_disable_all_animations/ */
* {
animation-delay: 0ms !important;
animation-duration: 0ms !important;
transition: none !important;
}

/* Remove the Very Ugly and Distracting and Useless Hamburger Button (because it is redundant with the arrows) */
#PanelUI-menu-button {display: none;}
/*


#PopupAutoCompleteRichResult {

  display: none!important;
}


/* TABS: on bottom */
#navigator-toolbox toolbar:not(#nav-bar):not(#toolbar-menubar) {-moz-box-ordinal-group:10}
#TabsToolbar {-moz-box-ordinal-group:1000!important}

#TabsToolbar {
 display: block !important; /*required for 71+*/
 position: absolute !important;
 bottom: 0 !important;
 width: 100vw !important;
}

#tabbrowser-tabs {
  width: 100vw !important;
}

*|*:root:not([chromehidden*="toolbar"]) #navigator-toolbox {padding-bottom: var(--tab-min-height) !important;}

/* TABS: height */
*|*:root {
 --tab-toolbar-navbar-overlap: 0px !important;
 --tab-min-height: 27px !important; /* adjust to suit your needs */
 --tab-min-width: 80px !important;
 --tabstoolbar-adjust: 0px; /* menubar and titlebar hidden */
}

#TabsToolbar {
 height: var(--tab-min-height) !important;
 margin-bottom: 1px !important;
 box-shadow: ThreeDShadow 0 -1px inset, -moz-dialog 0 1px !important;
}

#tabbrowser-tabs,
#tabbrowser-tabs > .tabbrowser-arrowscrollbox,
.tabbrowser-tabs[positionpinnedtabs] > .tabbrowser-tab[pinned] {
  min-height: var(--tab-min-height) !important;
  max-height: var(--tab-min-height) !important;
}

/* TabsToolbar with menubar and titlebar hidden */
*|*:root[tabsintitlebar]:not([inFullscreen="true"]):not([sizemode="maximized"])
 #toolbar-menubar[autohide="true"] ~ #TabsToolbar{
  bottom: var(--tab-min-height) !important;
  padding-top: calc(var(--tab-min-height) + var(--tabstoolbar-adjust)) !important; /*adjust var*/
}

*|*:root[tabsintitlebar]:not([inFullscreen="true"]) #toolbar-menubar[autohide="true"]
 ~ #TabsToolbar .titlebar-buttonbox-container {
  visibility: hidden !important;
 }

/* drag space */
.titlebar-spacer[type="pre-tabs"],
.titlebar-spacer[type="post-tabs"] {
  width: 40px;
}

/* Override vertical shifts when moving a tab */
#navigator-toolbox[movingtab] > #titlebar > #TabsToolbar {
  padding-bottom: unset !important;
}
#navigator-toolbox[movingtab] #tabbrowser-tabs {
  padding-bottom: unset !important;
  margin-bottom: unset !important;
}
#navigator-toolbox[movingtab] > #nav-bar {
  margin-top: unset !important;
}

/* hide indicators */
.private-browsing-indicator {display: none !important;}
.accessibility-indicator    {display: none !important;}





/* based on https://old.reddit.com/comments/fwhlva//fmolndz */
#urlbar[breakout][breakout-extend]:not([open]) {
top: calc((var(--urlbar-toolbar-height) - var(--urlbar-height)) / 2) !important;
left: 0 !important;
width: 100% !important;
}
#urlbar[breakout][breakout-extend]:not([open]) > #urlbar-input-container {
height: var(--urlbar-height) !important;
padding-block: 0px !important;
padding-inline: 0px !important;
}
#urlbar[breakout][breakout-extend][breakout-extend-animate] > #urlbar-background {
animation-name: none !important;
}
#urlbar[breakout][breakout-extend]:not([open]) > #urlbar-background {
box-shadow: none !important;
}