How to change toolbar button's position

I tried following code, but the computed left property is still 0px.

toolbarbutton#new-tab-button.toolbarbutton-1.chromeclass-toolbar-additional {
    position: absolute !important;
    width: 100px !important;
    left: 100px !important;
    box-sizing: content-box !important;
    display: inline !important;


  • Is this in a userChrome.css file?

    If absolute positioning doesn't work, how about a margin-left instead?
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