--- a/toolkit/mozapps/extensions/content/pluginPrefs.xul
+++ b/toolkit/mozapps/extensions/content/pluginPrefs.xul
@@ -35,23 +35,25 @@
         </row>
         <row class="detail-row-complex">
           <label>&plugin.mimeTypes;</label>
           <label class="text-list" id="pluginMimeTypes"/>
         </row>
         <row id="pluginFlashBlocking" class="detail-row-complex">
           <vbox>
             <label>&plugin.enableBlocklists.label;</label>
-            <label class="preferences-learnmore text-link">&setting.learnmore;</label>
+            <label class="preferences-learnmore text-link"
+                   href="https://support.mozilla.org/kb/flash-blocklists">&setting.learnmore;</label>
           </vbox>
           <checkbox id="pluginFlashBlockingCheckbox"/>
         </row>
         <row id="pluginEnableProtectedMode" class="detail-row-complex">
           <vbox>
             <label>&plugin.flashProtectedMode.label;</label>
-            <label class="preferences-learnmore text-link">&setting.learnmore;</label>
+            <label class="preferences-learnmore text-link"
+                   href="https://support.mozilla.org/kb/flash-protected-mode-settings">&setting.learnmore;</label>
           </vbox>
           <checkbox id="pluginEnableProtectedModeCheckbox"/>
         </row>
       </rows>
     </grid>
   </vbox>
 </window>