Add Safari mem bench in README; label charts helpfully

README.md

@@ -32,12 +32,20 @@ _EasyList_, _Peter Lowe's Adservers_, _EasyPrivacy_ are enabled by default when
 
 #### Memory
 
-<p align="center">
-On average, µBlock <b>really</b> does make your browser run leaner<br>
+<div align="center">
+On average, µBlock <b>really</b> does make your browser run leaner.<br><br>
+
+Chromium<br>
+<img src="https://raw.githubusercontent.com/gorhill/uBlock/master/doc/benchmarks/mem-usage-overall-chart-20141224.png" /><br><br>
+
+Safari<br>
+<img src="https://raw.githubusercontent.com/gorhill/uBlock/master/doc/benchmarks/mem-usage-overall-chart-safari-20150205.png" /><br><br>
+
+Firefox<br>
 <img src="https://raw.githubusercontent.com/gorhill/uBlock/master/doc/benchmarks/mem-usage-overall-chart-20150205.png" /><br>
-<img src="https://raw.githubusercontent.com/gorhill/uBlock/master/doc/benchmarks/mem-usage-overall-chart-20141224.png" /><br>
+
 <sup>Details of the benchmark available at <a href="https://github.com/gorhill/uBlock/wiki/Firefox-version:-benchmarking-memory-footprint">Firefox version: benchmarking memory footprint</a>.</sup>
-</p>
+</div>
 
 <sup>**Important note regarding memory usage:** There is currently a [bug in Chromium 39+ which causes a new memory leak each time the popup UI of an extension is opened](https://code.google.com/p/chromium/issues/detail?id=441500). This affects *all* extensions. Keep this in mind when measuring Chromium's memory usage. In the benchmarks, I avoided opening the popups completely.</sup>