--- a/browser/base/content/tabbrowser.xml
+++ b/browser/base/content/tabbrowser.xml
@@ -1324,16 +1324,21 @@
             // Change the "remote" attribute.
             let parent = aBrowser.parentNode;
             parent.removeChild(aBrowser);
             aBrowser.setAttribute("remote", aRemote ? "true" : "false");
             parent.appendChild(aBrowser);
 
             // Restore the progress listener.
             aBrowser.webProgress.addProgressListener(filter, Ci.nsIWebProgress.NOTIFY_ALL);
+
+            if (aRemote)
+              tab.setAttribute("remote", "true");
+            else
+              tab.removeAttribute("remote");
           ]]>
         </body>
       </method>
 
       <!--
         Returns true if we want to load the content for this URL in a
         remote process. Eventually this should just check whether aURL
         is unprivileged. Right now, though, we would like to load
@@ -1406,16 +1411,18 @@
 
             if (!aURI || isBlankPageURL(aURI))
               t.setAttribute("label", this.mStringBundle.getString("tabs.emptyTabTitle"));
             else
               t.setAttribute("label", aURI);
 
             t.setAttribute("crop", "end");
             t.setAttribute("onerror", "this.removeAttribute('image');");
+            if (remote)
+              t.setAttribute("remote", "true");
             t.className = "tabbrowser-tab";
 
             this.tabContainer._unlockTabSizing();
 
             // When overflowing, new tabs are scrolled into view smoothly, which
             // doesn't go well together with the width transition. So we skip the
             // transition in that case.
             let animate = !aSkipAnimation &&
@@ -2903,16 +2910,17 @@
       <constructor>
         <![CDATA[
           let browserStack = document.getAnonymousElementByAttribute(this, "anonid", "browserStack");
           this.mCurrentBrowser = document.getAnonymousElementByAttribute(this, "anonid", "initialBrowser");
           if (Services.prefs.getBoolPref("browser.tabs.remote")) {
             browserStack.removeChild(this.mCurrentBrowser);
             this.mCurrentBrowser.setAttribute("remote", true);
             browserStack.appendChild(this.mCurrentBrowser);
+            this.tabContainer.firstChild.setAttribute("remote", "true");
           }
 
           this.mCurrentTab = this.tabContainer.firstChild;
           document.addEventListener("keypress", this, false);
           window.addEventListener("sizemodechange", this, false);
 
           var uniqueId = "panel" + Date.now();
           this.mPanelContainer.childNodes[0].id = uniqueId;

--- a/browser/themes/linux/browser.css
+++ b/browser/themes/linux/browser.css
@@ -1657,16 +1657,20 @@ richlistitem[type~="action"][actiontype=
 }
 
 .tabbrowser-tab[selected="true"] {
   background-image: linear-gradient(@selectedTabHighlight@, @toolbarHighlight@ 32%),
                     linear-gradient(-moz-dialog, -moz-dialog);
   color: -moz-dialogtext;
 }
 
+.tabbrowser-tab[remote] {
+  text-decoration: underline;
+}
+
 #main-window[tabsontop=false]:not([disablechrome]) .tabbrowser-tab[selected=true]:not(:-moz-lwtheme) {
   background-image: linear-gradient(to top, rgba(0,0,0,.3) 1px, transparent 1px),
                     linear-gradient(@selectedTabHighlight@, @toolbarHighlight@ 32%),
                     linear-gradient(-moz-dialog, -moz-dialog);
 }
 
 .tabbrowser-tab[selected="true"]:-moz-lwtheme {
   background-image: linear-gradient(@selectedTabHighlight@, @toolbarHighlight@ 32%);

--- a/browser/themes/osx/browser.css
+++ b/browser/themes/osx/browser.css
@@ -2252,16 +2252,20 @@ toolbarbutton.chevron > .toolbarbutton-m
   text-shadow: @loweredShadow@;
   margin: 0;
   padding: 0;
   border: none;
   text-align: center;
   -moz-box-align: stretch;
 }
 
+.tabbrowser-tab[remote] {
+  text-decoration: underline;
+}
+
 %define TABSONTOP_TAB #tabbrowser-tabs[tabsontop="true"] > .tabbrowser-tab
 %define TABSONBOTTOM_TAB #tabbrowser-tabs[tabsontop="false"] > .tabbrowser-tab
 %define TABSONTOP_TAB_STACK #tabbrowser-tabs[tabsontop="true"] > .tabbrowser-tab > .tab-stack
 %define TABSONBOTTOM_TAB_STACK #tabbrowser-tabs[tabsontop="false"] > .tabbrowser-tab > .tab-stack
 %define TABSONTOP_NEWTAB_BUTTON #tabbrowser-tabs[tabsontop="true"] > .tabbrowser-arrowscrollbox > .tabs-newtab-button
 %define TABSONBOTTOM_NEWTAB_BUTTON #tabbrowser-tabs[tabsontop="false"] > .tabbrowser-arrowscrollbox > .tabs-newtab-button
 
 @TABSONTOP_TAB_STACK@ > .tab-background {

--- a/browser/themes/windows/browser.css
+++ b/browser/themes/windows/browser.css
@@ -1966,16 +1966,20 @@ richlistitem[type~="action"][actiontype=
   margin: 0;
   padding: 2px 0 4px;
   border-width: 4px 3px 0;
   border-style: solid;
   border-image: url(tabbrowser/tab.png) 4 3 0 fill repeat stretch;
   border-radius: 0;
 }
 
+.tabbrowser-tab[remote] {
+  text-decoration: underline;
+}
+
 .tabbrowser-tab:hover,
 .tabs-newtab-button:hover {
   background-image: @toolbarShadowOnTab@, @bgTabTextureHover@,
                     linear-gradient(-moz-dialog, -moz-dialog);
 }
 
 %ifndef WINDOWS_AERO
 @media (-moz-windows-theme: luna-blue) {