New Identity button icon could be more legible
On upgrading to 9.0a8, I had trouble identifying what the new "New Identity" button was supposed to represent. I can't tell if it's supposed to be a broom with sparkles around it, or a rocket in flight against a starfield.
Relatedly, the "New Identity" button also seems lower resolution and blockier than the other icons in the toolbar. (I'm on macOS 10.12.6 on a new-ish MacBook Pro with a Retina screen, if that matters.)
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