docs(theming): clean up and fix broken link in Browser Color guide (#11785)

Author: Splaktar

docs/content/Theming/06_browser_color.md

@@ -3,17 +3,21 @@
 @description
 
 <div class="layout_note">
-  <span>This feature is **mobile** only</span>
+  <span>This feature is for **mobile** devices only.</span>
 </div>
 
 ![browser color](https://cloud.githubusercontent.com/assets/6004537/18006666/50519c7e-6ba9-11e6-905b-c3751c20549c.png)
 
-Enables browser header coloring with [Material Design Colors](https://material.io/archive/guidelines/style/color.html#) and the theming system.
+This feature enables browser header theming using
+[Material Design Colors](https://material.io/archive/guidelines/style/color.html#)
+and the AngularJS Material theming system. For API details, please visit the
+<a ng-href="api/service/$mdThemingProvider#enableBrowserColor">$mdThemingProvider</a> documentation.
+
+For more information about this feature of mobile browsers, please visit
+[Web Fundamentals](https://developers.google.com/web/fundamentals/design-and-ux/browser-customization/#color_browser_elements).
+
+Below are usage examples for both the AngularJS configuration phase and during runtime.
 
-For more information, please visit:<br/> 
-https://developers.google.com/web/fundamentals/design-and-ui/browser-customization/theme-color.
- 
-Below are usage examples for both the AngularJS configuration phase, and during runtime.
 ### Config Phase
 <hljs lang="js">
   myAppModule
@@ -43,5 +47,3 @@ Below are usage examples for both the AngularJS configuration phase, and during
     })
 </hljs>
 
-For api reference please visit <a ng-href="/api/service/$mdThemingProvider#enableBrowserColor">$mdThemingProvider</a> documentation.
-