How to turn off this icon?

[MonfGeiger]

I updated firefox, grabbed a new photon ui fix, popped the user.js into it to "update" what settings there were, i had to fiddle around to get some things back to what they were, but i've ran into a......not quite issue, but an overall gnat i'd like help getting rid of

basically that blue icon.....how do i turn it off again? i forgor :/

also, i'd like to know if any of my userchrome.css settings are invalid, or if they still work with the ui fix

/** Add your custom styles below **********************************************/

/* Enable option to edit bookmark URLs under Add Bookmark (blue star) menu */
/*
 * .editBMPanel_locationRow {
 *   display: initial !important;
 * }
*/

/* Disable Email Image/Audio/Video and Set as Desktop Background context menu items */
/*
 * #context-sendimage,
 * #context-sendvideo,
 * #context-sendaudio,
 * #context-setDesktopBackground {
 *   display: none !important;
 * }
*/

  /* Navbar Border */
  :root:is(:-moz-lwtheme, [lwtheme]) #navigator-toolbox {
    --tabs-border-color: rgba(160, 160, 160, 0.4); /* Legacy: v96, (0, 0, 0, 0.3) -> (0, 0, 0, 0.4)  */
    --lwt-tabs-border-color: rgba(0, 0, 0, 0.4);
  }

[black7375]

Does this mean you want to remove the blue Insert tab icon?

.tab-drop-indicator {
 display: none; 
}

[MonfGeiger]

that did it, thanks :)