New toggle button on First-run page

chrome/skin/firstRun.css

 /*
  * This file is part of Adblock Plus <http://adblockplus.org/>,
  * Copyright (C) 2006-2013 Eyeo GmbH
  *
  * Adblock Plus is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 3 as
  * published by the Free Software Foundation.
  *
  * Adblock Plus is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 103 matching lines @@
 }
 
 #features-title::after
 {
   content: ":";
 }
 
 .feature:not([hidden])
 {
   display: block;
+  position: relative;
   list-style-type: none;
   padding-bottom: 20px;
 }
 
 .feature-image, .feature-description
 {
   display: inline-block;
   *display: inline; /* IE6 inline-block fix */
   *zoom: 1;
   vertical-align: top;
@@ skipping 164 matching lines @@
   bottom: 0;
   left: 0;
   right: 0;
   padding: 70px 0 0;
   text-align: center;
   background: -webkit-linear-gradient(rgba(255, 255, 255, 0) 0, rgba(255, 255, 255, 1) 50px);
   background: -moz-linear-gradient(rgba(255, 255, 255, 0) 0, rgba(255, 255, 255, 1) 50px);
   background: -o-linear-gradient(rgba(255, 255, 255, 0) 0, rgba(255, 255, 255, 1) 50px);
   background: -ms-linear-gradient(rgba(255, 255, 255, 0) 0, rgba(255, 255, 255, 1) 50px);
   background: linear-gradient(rgba(255, 255, 255, 0) 0, rgba(255, 255, 255, 1) 50px);
+  z-index: 1;

[Wladimir Palant, 2013/07/08 09:37:29]

Are we supporting IE6 now? In all other browsers that property should be
pointless.

[Thomas Greiner, 2013/07/08 10:30:19]

Done.

 }
 
 footer h1
 {
   margin: 0;
   font-size: 18px;
   color: #666;
   position: fixed;
   bottom: 70px;
   left: 0;
@@ skipping 113 matching lines @@
 
 #share-popup.visible
 {
   -webkit-transition-duration: 0.15s;
   -moz-transition-duration: 0.15s;
   -o-transition-duration: 0.15s;
   -ms-transition-duration: 0.15s;
   transition-duration: 0.15s;
 }
 
+.toggle
+{
+  cursor: pointer;
+  position: absolute;
+  display: inline-block;
+  top: 50%;
+  height: 22px;
+  margin: -21px 0px 7px 0px;
+  border-radius: 9999px;
+  box-shadow: 0 0 0 1px #999;
+  overflow: hidden;
+  -moz-user-select: none;
+  -webkit-user-select: none;
+  user-select: none;
+}
+
+.toggle:active
+{
+  cursor: wait;
+}
+
+.toggle-on, .toggle-off
+{
+  min-width: 42px;
+  height: 100%;
+  font-size: 11px;
+  font-weight: 500;
+  text-align: center;
+  line-height: 22px;
+}
+
+.toggle-on
+{
+  padding: 0px 30px 0px 10px;
+  color: rgba(255,255,255, 0.8);
+  text-shadow: 1px 1px rgba(0,0,0,0.2);
+  box-shadow: inset 2px 2px 6px rgba(0,0,0,0.2);
+  background: rgb(69,163,31);
+}
+
+.toggle-off
+{
+  padding: 0px 10px 0px 30px;
+  color: rgba(0,0,0,0.6);
+  text-shadow: 1px 1px rgba(255,255,255,0.2);
+  background: #cfcfcf;
+  background: -moz-linear-gradient(top,  #cfcfcf 0%, #f5f5f5 100%);
+  background: -webkit-linear-gradient(top,  #cfcfcf 0%,#f5f5f5 100%);
+  background: linear-gradient(to bottom,  #cfcfcf 0%,#f5f5f5 100%);
+}
+
+.toggle-blob
+{
+  position: absolute;
+  top: 0px;
+  right: 0px;
+  height: 100%;
+  width: 22px;
+  border-radius: 50px;
+  box-shadow: 1px 1px 2px #888;
+  background: #cfcfcf;
+  background: -moz-linear-gradient(bottom,  #cfcfcf 0%, #f5f5f5 100%);
+  background: -webkit-linear-gradient(bottom,  #cfcfcf 0%,#f5f5f5 100%);
+  background: linear-gradient(to top,  #cfcfcf 0%,#f5f5f5 100%);
+  z-index: 1;

[Wladimir Palant, 2013/07/08 09:37:29]

Same here, why do we need that?

[Thomas Greiner, 2013/07/08 10:30:19]

Done.

+}
+
+.off .toggle-on
+{
+  margin-top: -22px;
+}
+
+.off .toggle-blob
+{
+  left: 0px;
+  right: auto;
+}
+
 /* Adjust font size on smaller screens */
 @media (max-height: 800px)
 {
   body
   {
     font-size: 19px;
   }
 }
 
 @media (max-height: 750px)
 {
   body
   {
     font-size: 17px;
   }
 }
 
 @media (max-height: 700px)
 {
   body
   {
     font-size: 16px;
   }
 }