--- a/browser/devtools/webconsole/test/browser_webconsole_bug_737873_mixedcontent.js
+++ b/browser/devtools/webconsole/test/browser_webconsole_bug_737873_mixedcontent.js
@@ -7,23 +7,30 @@
  *  Tanvi Vyas <tanvi@mozilla.com>
  *
  * ***** END LICENSE BLOCK ***** */
 
 // Tests that the Web Console Mixed Content messages are displayed
 
 const TEST_HTTPS_URI = "https://example.com/browser/browser/devtools/webconsole/test/test-bug-737873-mixedcontent.html";
 
+var origBlockDisplay;
+var origBlockActive;
+
 function test() {
   addTab("data:text/html;charset=utf8,Web Console mixed content test");
   browser.addEventListener("load", onLoad, true);
 }
 
 function onLoad(aEvent) {
   browser.removeEventListener("load", onLoad, true);
+  origBlockDisplay = Services.prefs.getBoolPref("security.mixed_content.block_display_content");
+  origBlockActive = Services.prefs.getBoolPref("security.mixed_content.block_active_content")
+  Services.prefs.setBoolPref("security.mixed_content.block_display_content", false);
+  Services.prefs.setBoolPref("security.mixed_content.block_active_content", false);
   openConsole(null, testMixedContent);
 }
 
 function testMixedContent(hud) {
   content.location = TEST_HTTPS_URI;
   var aOutputNode = hud.outputNode;
 
   waitForSuccess(
@@ -40,20 +47,20 @@ function testMixedContent(hud) {
         let node = aOutputNode.querySelector(".webconsole-mixed-content");
         ok(testSeverity(node), "Severity type is SEVERITY_WARNING.");
 
         //tests on the warningNode
         let warningNode = aOutputNode.querySelector(".webconsole-mixed-content-link");
         is(warningNode.value, "[Mixed Content]", "Message text is accurate." );
         testClickOpenNewTab(warningNode);
 
-        finishTest();
+        endTest();
       },
 
-      failureFn: finishTest,
+      failureFn: endTest,
     }
   );
 
 }
 
 function testSeverity(node) {
   let linkNode = node.parentNode;
   let msgNode = linkNode.parentNode;
@@ -76,8 +83,14 @@ function testClickOpenNewTab(warningNode
 
   EventUtils.synthesizeMouse(warningNode, 2, 2, {},
                              warningNode.ownerDocument.defaultView);
 
   ok(linkOpened, "Clicking the Mixed Content Warning node opens the desired page");
 
   window.openUILinkIn = oldOpenUILinkIn;
 }
+
+function endTest() {
+  Services.prefs.setBoolPref("security.mixed_content.block_display_content", origBlockDisplay);
+  Services.prefs.setBoolPref("security.mixed_content.block_active_content", origBlockActive);
+  finishTest();
+}

--- a/dom/tests/mochitest/localstorage/test_localStorageQuota.html
+++ b/dom/tests/mochitest/localstorage/test_localStorageQuota.html
@@ -9,16 +9,18 @@
 <script type="text/javascript">
 
 netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");
 
 var currentTest = 1;
 var prefs = Components.classes["@mozilla.org/preferences-service;1"]
             .getService(Components.interfaces.nsIPrefBranch);
 var quota;
+var origBlockDisplay;
+var origBlockActive;
 
 function doNextTest()
 {
   slave = frame;
 
   netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");
 
   switch (currentTest)
@@ -28,16 +30,22 @@ function doNextTest()
     case 1:
       try {
         quota = prefs.getIntPref("dom.storage.default_quota");
       } catch (ex) {
         quota = 5*1024;
       }
       prefs.setIntPref("dom.storage.default_quota", 1);
 
+      origBlockDisplay = prefs.getBoolPref("security.mixed_content.block_display_content");
+      origBlockActive = prefs.getBoolPref("security.mixed_content.block_active_content");
+
+      prefs.setBoolPref("security.mixed_content.block_display_content", false);
+      prefs.setBoolPref("security.mixed_content.block_active_content", false);
+
       slaveOrigin = "http://example.com";
       slave.location = slaveOrigin + slavePath + "frameQuota.html?add&A&success";
       break;
 
     // In subdomain now set another key with length 500 bytes, i.e.
     // allocate 501 bytes
     case 2:
       slaveOrigin = "http://test1.example.com";
@@ -95,16 +103,18 @@ function doNextTest()
     case 10:
       // Do a clean up...
       slaveOrigin = "https://test2.example.com";
       slave.location = slaveOrigin + slavePath + "frameQuota.html?clear";
       break;
 
     default: // end
       prefs.setIntPref("dom.storage.default_quota", quota);
+      prefs.setBoolPref("security.mixed_content.block_display_content", origBlockDisplay);
+      prefs.setBoolPref("security.mixed_content.block_active_content", origBlockActive);
       SimpleTest.finish();
   }
 
   ++currentTest;
 }
 
 function doStep()
 {

--- a/dom/tests/mochitest/localstorage/test_localStorageQuotaSessionOnly.html
+++ b/dom/tests/mochitest/localstorage/test_localStorageQuotaSessionOnly.html
@@ -17,16 +17,18 @@ var io = Components.classes["@mozilla.or
   .getService(Components.interfaces.nsIIOService);
 var uri = io.newURI(window.location, "", null);
 var cp = Components.classes["@mozilla.org/cookie/permission;1"]
   .getService(Components.interfaces.nsICookiePermission);
 
 cp.setAccess(uri, Components.interfaces.nsICookiePermission.ACCESS_SESSION);
 
 var quota;
+var origBlockDisplay;
+var origBlockActive;
 
 function doNextTest()
 {
   slave = frame;
 
   netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");
 
   switch (currentTest)
@@ -36,16 +38,21 @@ function doNextTest()
     case 1:
       try {
         quota = prefs.getIntPref("dom.storage.default_quota");
       } catch (ex) {
         quota = 5*1024;
       }
       prefs.setIntPref("dom.storage.default_quota", 1);
 
+      origBlockDisplay = prefs.getBoolPref("security.mixed_content.block_display_content");
+      origBlockActive = prefs.getBoolPref("security.mixed_content.block_active_content");
+
+      prefs.setBoolPref("security.mixed_content.block_display_content", false);
+      prefs.setBoolPref("security.mixed_content.block_active_content", false);
 
       slaveOrigin = "http://example.com";
       slave.location = slaveOrigin + slavePath + "frameQuotaSessionOnly.html?add&A&success";
       break;
 
     // In subdomain now set another key with length 500 bytes, i.e.
     // allocate 501 bytes
     case 2:
@@ -104,16 +111,18 @@ function doNextTest()
     case 10:
       // Do a clean up...
       slaveOrigin = "https://test2.example.com";
       slave.location = slaveOrigin + slavePath + "frameQuotaSessionOnly.html?clear";
       break;
 
     default:
       prefs.setIntPref("dom.storage.default_quota", quota);
+      prefs.setBoolPref("security.mixed_content.block_display_content", origBlockDisplay);
+      prefs.setBoolPref("security.mixed_content.block_active_content", origBlockActive);
       cp.setAccess(uri, Components.interfaces.nsICookiePermission.ACCESS_DEFAULT);
       SimpleTest.finish();
   }
 
   ++currentTest;
 }
 
 function doStep()

--- a/dom/tests/mochitest/localstorage/test_localStorageQuotaSessionOnly2.html
+++ b/dom/tests/mochitest/localstorage/test_localStorageQuotaSessionOnly2.html
@@ -15,16 +15,18 @@ var prefs = Cc["@mozilla.org/preferences
             .getService(SpecialPowers.Ci.nsIPrefBranch);
 var io = Cc["@mozilla.org/network/io-service;1"]
   .getService(SpecialPowers.Ci.nsIIOService);
 var uri = io.newURI(window.location, "", null);
 var cp = Cc["@mozilla.org/cookie/permission;1"]
   .getService(SpecialPowers.Ci.nsICookiePermission);
 
 var quota;
+var origBlockDisplay;
+var origBlockActive;
 
 function doNextTest()
 {
   slave = frame;
 
   switch (currentTest)
   {
     // Initialy setup the quota to testing value of 1024B and
@@ -32,16 +34,21 @@ function doNextTest()
     case 1:
       try {
         quota = prefs.getIntPref("dom.storage.default_quota");
       } catch (ex) {
         quota = 5*1024;
       }
       prefs.setIntPref("dom.storage.default_quota", 1);
 
+      origBlockDisplay = prefs.getBoolPref("security.mixed_content.block_display_content");
+      origBlockActive = prefs.getBoolPref("security.mixed_content.block_active_content");
+
+      prefs.setBoolPref("security.mixed_content.block_display_content", false);
+      prefs.setBoolPref("security.mixed_content.block_active_content", false)
 
       slaveOrigin = "http://example.com";
       slave.location = slaveOrigin + slavePath + "frameQuotaSessionOnly.html?add&A&success";
       break;
 
     // In subdomain now set another key with length 500 bytes, i.e.
     // allocate 501 bytes
     case 2:
@@ -88,16 +95,18 @@ function doNextTest()
       // Do a clean up...
       slaveOrigin = "http://example.com";
       slave.location = slaveOrigin + slavePath + "frameQuotaSessionOnly.html?clear";
       cp.setAccess(uri, SpecialPowers.Ci.nsICookiePermission.ACCESS_DEFAULT);
       break;
 
     default:
       prefs.setIntPref("dom.storage.default_quota", quota);
+      prefs.setBoolPref("security.mixed_content.block_display_content", origBlockDisplay);
+      prefs.setBoolPref("security.mixed_content.block_active_content", origBlockActive);
       cp.setAccess(uri, SpecialPowers.Ci.nsICookiePermission.ACCESS_DEFAULT);
       SimpleTest.finish();
   }
 
   ++currentTest;
 }
 
 function doStep()

--- a/dom/tests/mochitest/localstorage/test_localStorageReplace.html
+++ b/dom/tests/mochitest/localstorage/test_localStorageReplace.html
@@ -12,16 +12,19 @@
 <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
 <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
 
 <script type="text/javascript">
 
 var shell;
 var shellType;
 var failureRegExp = new RegExp("^FAILURE");
+var origBlockDisplay;
+var origBlockActive;
+
 
 window.addEventListener("message", onMessageReceived, false);
 
 function onMessageReceived(event)
 {
   switch (event.data)
   {
     case "init_done":
@@ -42,34 +45,46 @@ function onMessageReceived(event)
           // We finished testing in a frame
           // proceed with test in a separate window
           shellType = "window";
           shell = window.open("http://example.org:80/tests/dom/tests/mochitest/localstorage/frameReplace.html?init&" + shellType);
           break;
 
         case "window":
           shell.close();
-          window.setTimeout(function() {SimpleTest.finish();}, 0);
+          window.setTimeout(function() {endTest();}, 0);
           break;
       }
       break;
 
     default:
       SimpleTest.ok(!event.data.match(failureRegExp), event.data);
       break;
   }
 }
 
 function startTest()
 {
+  origBlockDisplay = SpecialPowers.getBoolPref("security.mixed_content.block_display_content");
+  origBlockActive = SpecialPowers.getBoolPref("security.mixed_content.block_active_content");
+  SpecialPowers.setBoolPref("security.mixed_content.block_display_content", false);
+  SpecialPowers.setBoolPref("security.mixed_content.block_active_content", false);
+
   shellType = "frame";
   shell = frame;
   shell.location = "http://example.org:80/tests/dom/tests/mochitest/localstorage/frameReplace.html?init&" + shellType;
 }
 
+function endTest()
+{
+  SpecialPowers.setBoolPref("security.mixed_content.block_display_content", origBlockDisplay);
+  SpecialPowers.setBoolPref("security.mixed_content.block_active_content", origBlockActive);
+  SimpleTest.finish();
+}
+
 SimpleTest.waitForExplicitFinish();
 
 </script>
 
 </head>
 
 <body onload="startTest();">
   <iframe src="" name="frame"></iframe>