<p dir="auto">Looking at the demos on <a href="http://material-ui.com" rel="nofollow">http://material-ui.com</a> for Buttons I noticed the click effect is broken in Firefox. The click effect works fine on Lists though, so there's just something weird going on with buttons in Firefox. It works fine on Chrome.</p>
<p dir="auto">I am using Firefox 45 on Linux, and the demo app at <a href="http://www.material-ui.com/#/customization/themes" rel="nofollow">http://www.material-ui.com/#/customization/themes</a> (version 0.14.4) shows that the ripple effect works well for everything but the buttons.</p>
<p dir="auto">That includes the Tab headers, which I suspect are buttons as well.</p>
<p dir="auto">The problem is present with alphas for 0.15 as well</p>