--- a/browser/devtools/app-manager/content/connection-footer.xhtml
+++ b/browser/devtools/app-manager/content/connection-footer.xhtml
@@ -97,16 +97,17 @@
           <div class="connected-indicator"></div>
           <div class="banner-box">
             <div class="banner-content">
               <div class="no-simulator">
                 <span>&connection.noSimulatorInstalled;</span>
                 <button class="action-primary" onclick="UI.installSimulator()" title="&connection.installOneSimulatorTooltip;">&connection.installOneSimulator;</button>
               </div>
               <div class="found-simulator">
+                <span>&connection.startRegisteredSimulator;</span>
                 <span template-loop='{"arrayPath":"simulators.versions","childSelector":"#simulator-item-template"}'></span>
                 <button class="action-primary" onclick="UI.installSimulator()" title="&connection.installAnotherSimulatorTooltip;">&connection.installAnotherSimulator;</button>
               </div>
               <button class="action-cancel" onclick="UI.cancelShowSimulatorList()" title="&connection.cancelShowSimulatorTooltip;">&connection.cancel;</button>
             </div>
           </div>
         </div>
 
@@ -119,17 +120,17 @@
         </div>
 
       </div>
     </div>
   </body>
 
   <template id="simulator-item-template">
   <span>
-    <button class="simulator-item" onclick="UI.startSimulator(this.dataset.version)" template='{"type":"attribute","path":"version","name":"data-version"}' title="&connection.startSimulatorTooltip;">
+    <button class="simulator-item action-primary" onclick="UI.startSimulator(this.dataset.version)" template='{"type":"attribute","path":"version","name":"data-version"}' title="&connection.startSimulatorTooltip;">
       <span template='{"type":"textContent", "path":"version"}'></span>
     </button>
   </span>
   </template>
 
   <template id="adb-devices-template">
   <span>
     <button class="adb-device action-primary" onclick="UI.connectToAdbDevice(this.dataset.name)" template='{"type":"attribute","path":"name","name":"data-name"}'>

--- a/browser/locales/en-US/chrome/browser/devtools/app-manager.dtd
+++ b/browser/locales/en-US/chrome/browser/devtools/app-manager.dtd
@@ -52,16 +52,17 @@
 <!ENTITY connection.cancelConnectTooltip "Cancel the connection in progress.">
 <!ENTITY connection.cancelShowSimulatorTooltip "Exit the Simulator connection mode and return to the initial prompt.">
 <!ENTITY connection.or "or">
 <!ENTITY connection.noSimulatorInstalled "No simulator installed.">
 <!ENTITY connection.installOneSimulator "Install Simulator">
 <!ENTITY connection.installOneSimulatorTooltip "Install a version of the Simulator by downloading the relevant add-on.">
 <!ENTITY connection.installAnotherSimulator "Add">
 <!ENTITY connection.installAnotherSimulatorTooltip "Install an additional version of the Simulator by downloading the relevant add-on.">
+<!ENTITY connection.startRegisteredSimulator "Start:">
 
 <!ENTITY projects.localApps "Local Apps">
 <!ENTITY projects.addApp "Add">
 <!ENTITY projects.addPackaged "Add Packaged App">
 <!ENTITY projects.addPackagedTooltip "Add a new packaged app (a directory) from your computer.">
 <!ENTITY projects.addHosted "Add Hosted App">
 <!ENTITY projects.addHostedTooltip "Add a new hosted app (link to a manifest.webapp file) from a remote website.">
 <!ENTITY projects.title "Local Apps">