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Firefox UI help


How do I get rid of this white line?

I've already used this and it removes one line of pixel but stills still another line of pixel.
#navigator-toolbox::after {
display: none !important;

I'm also using classic theme restorer Firefox addon.


  • Waterfox
    Give this a try:
    #main-window toolbar {
    background: none !important;
    border: none !important;
    box-shadow: none !important;
  • Didn't work, thanks for trying
  • Waterfox
    Try replacing toolbar with toolbox in code above.
  • Still don't work
  • edited July 2017 Waterfox
    I think it's content. Don't remember now, but i had to lift it 1px up to sort of 'hide' it. Nothing else works. I'll try to find the code (no promises).

    EDIT: nope, it's #navigator-toolbox:after, works here fine (BTW, i took the code from the Fx default file). Make it border-bottom: 4px solid red and see it:

  • I changed to:
    border-style: solid;
    border-color: red;
    border-bottom: 4px;


    That white line of pixel still there
  • edited July 2017 Waterfox
    With CTR, choosing V2 of "Tabs not on top" may work.


    Alternatively, play with the margin code from the CTR source file.

    #main-window[defaultfxtheme="true"][tabsontop="false"] #TabsToolbar:not(:-moz-lwtheme) {margin-bottom: -1px !important; }
    #main-window[defaultfxtheme="true"][tabsontop="false"] #TabsToolbar:-moz-lwtheme { margin-bottom: -2px !important;}
  • This worked here:
    #navigator-toolbox:after {border-bottom: none !important;}
  • #main-window[defaultfxtheme="true"][tabsontop="false"] #TabsToolbar:not(:-moz-lwtheme) {margin-bottom: -1px !important; }
    #main-window[defaultfxtheme="true"][tabsontop="false"] #TabsToolbar:-moz-lwtheme { margin-bottom: -2px !important;}
    This worked, thanks :D
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