Screenshot of the <a href="https://en.wikipedia.org/wiki/Firefox" class="extiw" title="en:Firefox">Firefox</a> add-on <a rel="nofollow" class="external text" href="https://addons.mozilla.org/firefox/addon/nicermediapages/">"Nicer Media Pages"</a> in action showing an SVG centered on the screen and exposing transparency on hover.
<a href="//commons.wikimedia.org/wiki/User:Patrick87" title="User:Patrick87">Patrick87</a>
<span class="int-own-work" lang="en">Own work</span>