--- a/browser/base/content/pageinfo/pageInfo.xul
+++ b/browser/base/content/pageinfo/pageInfo.xul
@@ -284,16 +284,17 @@
                  value="&permPlugins;" control="pluginsRadioGroup"/>
           <hbox id="permPluginTemplate" role="group" aria-labelledby="permPluginsLabel" align="baseline">
             <label class="permPluginTemplateLabel"/>
             <spacer flex="1"/>
             <radiogroup class="permPluginTemplateRadioGroup" orient="horizontal" command="cmd_pluginsToggle">
               <radio class="permPluginTemplateRadioDefault" label="&permUseDefault;"/>
               <radio class="permPluginTemplateRadioAsk" label="&permAskAlways;"/>
               <radio class="permPluginTemplateRadioAllow" label="&permAllow;"/>
+              <radio class="permPluginTemplateRadioHide" label="&permHide;"/>
               <radio class="permPluginTemplateRadioBlock" label="&permBlock;"/>
             </radiogroup>
           </hbox>
         </vbox>
       </vbox>
       <hbox pack="end">
         <button command="cmd_help" label="&helpButton.label;" dlgtype="help"/>
       </hbox>

--- a/browser/base/content/pageinfo/permissions.js
+++ b/browser/base/content/pageinfo/permissions.js
@@ -178,16 +178,18 @@ function fillInPluginPermissionTemplate(
   let permPluginTemplate = document.getElementById("permPluginTemplate").cloneNode(true);
   permPluginTemplate.setAttribute("permString", aPermissionString);
   let attrs = [
     [ ".permPluginTemplateLabel", "value", aPluginName ],
     [ ".permPluginTemplateRadioGroup", "id", aPermissionString + "RadioGroup" ],
     [ ".permPluginTemplateRadioDefault", "id", aPermissionString + "#0" ],
     [ ".permPluginTemplateRadioAsk", "id", aPermissionString + "#3" ],
     [ ".permPluginTemplateRadioAllow", "id", aPermissionString + "#1" ],
+    // #8 comes from Ci.nsIObjectLoadingContent.PLUGIN_PERMISSION_PROMPT_ACTION_QUIET
+    [ ".permPluginTemplateRadioHide", "id", aPermissionString + "#8"],
     [ ".permPluginTemplateRadioBlock", "id", aPermissionString + "#2" ]
   ];
 
   for (let attr of attrs) {
     permPluginTemplate.querySelector(attr[0]).setAttribute(attr[1], attr[2]);
   }
 
   return permPluginTemplate;

--- a/browser/locales/en-US/chrome/browser/pageInfo.dtd
+++ b/browser/locales/en-US/chrome/browser/pageInfo.dtd
@@ -50,16 +50,17 @@
 <!ENTITY  feedSubscribe.accesskey "u">
 
 <!ENTITY  permTab               "Permissions">
 <!ENTITY  permTab.accesskey     "P">
 <!ENTITY  permUseDefault        "Use Default">
 <!ENTITY  permAskAlways         "Always ask">
 <!ENTITY  permAllow             "Allow">
 <!ENTITY  permAllowSession      "Allow for Session">
+<!ENTITY  permHide              "Hide">
 <!ENTITY  permBlock             "Block">
 <!ENTITY  permissionsFor        "Permissions for:">
 <!ENTITY  permPlugins           "Activate Plugins">
 
 <!ENTITY  securityTab           "Security">
 <!ENTITY  securityTab.accesskey "S">
 <!ENTITY  securityView.certView "View Certificate">
 <!ENTITY  securityView.accesskey "V">