Rated 3 out of 5 stars

light gray brushed metal would be great if the
letters were Bold....ie...dark...so one could read it.

There is one

Update: I also changed the text color of this theme to be a bit darker now.
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There already is a derivative work based on this one but with darker font color. Here:
https://addons.mozilla.org/en-US/firefox/addon/brushed-metal-from-_ntpl_-with/