Thank you for prints. I dont know about Brave, i never used, but i send one tip/idea that can help you.
In Design Manager, u can insert one div with class where the CTA Snippet are inserted in code, and in CSS you can styling based in this class.
Example:
HTML
<div class="cta-test">
Here the snippet of CTA button
</div>
CSS
.cta-test a{
background...
}
I know it is not ideal, but I have never used this browser, so the above suggestion is a way to style the button by the DIV class where it will be inserted.
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