--- a/toolkit/locales/en-US/chrome/pluginproblem/pluginproblem.dtd
+++ b/toolkit/locales/en-US/chrome/pluginproblem/pluginproblem.dtd
@@ -1,14 +1,13 @@
 <!-- This Source Code Form is subject to the terms of the Mozilla Public
    - License, v. 2.0. If a copy of the MPL was not distributed with this
    - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
 
 <!-- LOCALIZATION NOTE (tapToPlayPlugin): Mobile (used for touch interfaces) only has one type of plugin possible. -->
-<!ENTITY pluginActivationWarning                             "This site uses a plugin that may slow &brandShortName;.">
 <!ENTITY tapToPlayPlugin                                     "Tap here to activate plugin.">
 <!ENTITY clickToActivatePlugin                               "Activate plugin.">
 <!ENTITY checkForUpdates                                     "Check for updates…">
 <!ENTITY blockedPlugin.label                                 "This plugin has been blocked for your protection.">
 <!ENTITY hidePluginBtn.label                                 "Hide plugin">
 <!ENTITY managePlugins                                       "Manage plugins…">
 
 <!-- LOCALIZATION NOTE (reloadPlugin.pre): include a trailing space as needed -->

--- a/toolkit/pluginproblem/content/pluginProblem.xml
+++ b/toolkit/pluginproblem/content/pluginProblem.xml
@@ -22,17 +22,16 @@
     </resources>
 
     <content>
         <html:div class="mainBox" anonid="main" chromedir="&locale.dir;">
             <html:div class="hoverBox">
                 <html:label>
                     <html:button class="icon" anonid="icon"/>
                     <html:div class="msg msgVulnerabilityStatus" anonid="vulnerabilityStatus"><!-- set at runtime --></html:div>
-                    <html:div class="msg msgActivationWarning">&pluginActivationWarning;</html:div>
                     <html:div class="msg msgTapToPlay">&tapToPlayPlugin;</html:div>
                     <html:div class="msg msgClickToPlay" anonid="clickToPlay">&clickToActivatePlugin;</html:div>
                 </html:label>
 
                 <html:div class="msg msgBlocked">&blockedPlugin.label;</html:div>
                 <html:div class="msg msgCrashed">
                     <html:div class="msgCrashedText" anonid="crashedText"><!-- set at runtime --></html:div>
                     <!-- link href set at runtime -->

--- a/toolkit/pluginproblem/content/pluginProblemContent.css
+++ b/toolkit/pluginproblem/content/pluginProblemContent.css
@@ -92,17 +92,16 @@ a .hoverBox,
 }
 
 .msg {
   display: none;
 }
 
 a .msgClickToPlay,
 :-moz-handler-clicktoplay .msgClickToPlay,
-:-moz-handler-clicktoplay .msgActivationWarning,
 :-moz-handler-vulnerable-updatable .msgVulnerabilityStatus,
 :-moz-handler-vulnerable-updatable .msgCheckForUpdates,
 :-moz-handler-vulnerable-updatable .msgClickToPlay,
 :-moz-handler-vulnerable-no-update .msgVulnerabilityStatus,
 :-moz-handler-vulnerable-no-update .msgClickToPlay,
 :-moz-handler-blocked .msgBlocked,
 :-moz-handler-crashed .msgCrashed {
   display: block;