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How to remove 1px border around firefox window?

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There's a small 1px border that separates my navigation toolbar and whatever website I'm looking at. DOM and Inspector doesn't know what I'm looking for, and I haven't found any solution

There's a small 1px border that separates my navigation toolbar and whatever website I'm looking at. DOM and Inspector doesn't know what I'm looking for, and I haven't found any solution

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Have you tried safe mode, to see if its a addon affecting it (Maybe Hide Menubar 6.0.20110915?)

See: Diagnose Firefox issues using Troubleshoot Mode

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Although I couldn't figure out what the line is, this is a simple way to remove it:

  #browser { margin-top: -1px !important; }

由 bluedragon14 於 修改