firefox css, custom UBlock Origin icon + throw it inside the URL bar

gistfile1.css

/* Change the icons - an icon for on state, an icon for the off state (optional: use an SVG with context-fill) */
#ublock0_raymondhill_net-BAP image{
list-style-image: url("ubon.png") !important;
}
#ublock0_raymondhill_net-BAP[tooltiptext="uBlock Origin (off)"] image{
list-style-image: url("uboff.png") !important;
}

/* Spacing adjustments to URL Bar - so that any icon placed next to it (Right Side) will sit inside of it */

#urlbar{
  padding-inline-end: calc(17px + 2 * var(--urlbar-icon-padding));
}
#urlbar-container+.chromeclass-toolbar-additional{
  margin-inline-start: calc(0px - 19px - 2 * var(--urlbar-icon-padding) - var(--urlbar-margin-inline)) !important;
  position: relative;
  --toolbarbutton-inner-padding: var(--urlbar-icon-padding);
  --toolbarbutton-hover-background: var(--urlbar-box-hover-bgcolor);
}

/* use the customize toolbar page to drag ublock-origin, or any other toolbar button right next to the URL Bar (Right Side)