diff --git a/b2g/app/b2g.js b/b2g/app/b2g.js
index 1e37734c740..8a4d5678532 100644
--- a/b2g/app/b2g.js
+++ b/b2g/app/b2g.js
@@ -333,7 +333,7 @@ pref("urlclassifier.gethashtables", "goog-phish-shavar,goog-malware-shavar");
 // If an urlclassifier table has not been updated in this number of seconds,
 // a gethash request will be forced to check that the result is still in
 // the database.
-pref("urlclassifier.confirm-age", 2700);
+pref("urlclassifier.max-complete-age", 2700);
 
 // URL for checking the reason for a malware warning.
 pref("browser.safebrowsing.malware.reportURL", "http://safebrowsing.clients.google.com/safebrowsing/diagnostic?client=%NAME%&hl=%LOCALE%&site=");
diff --git a/browser/app/profile/firefox.js b/browser/app/profile/firefox.js
index c878dd72665..57f2ab2a8d9 100644
--- a/browser/app/profile/firefox.js
+++ b/browser/app/profile/firefox.js
@@ -741,7 +741,7 @@ pref("urlclassifier.gethashtables", "goog-phish-shavar,goog-malware-shavar");
 // If an urlclassifier table has not been updated in this number of seconds,
 // a gethash request will be forced to check that the result is still in
 // the database.
-pref("urlclassifier.confirm-age", 2700);
+pref("urlclassifier.max-complete-age", 2700);
 #endif
 
 pref("browser.geolocation.warning.infoURL", "http://www.mozilla.com/%LOCALE%/firefox/geolocation/");
diff --git a/mobile/android/app/mobile.js b/mobile/android/app/mobile.js
index 72c01d1f364..65395735702 100644
--- a/mobile/android/app/mobile.js
+++ b/mobile/android/app/mobile.js
@@ -584,7 +584,7 @@ pref("urlclassifier.gethashtables", "goog-phish-shavar,goog-malware-shavar");
 // If an urlclassifier table has not been updated in this number of seconds,
 // a gethash request will be forced to check that the result is still in
 // the database.
-pref("urlclassifier.confirm-age", 2700);
+pref("urlclassifier.max-complete-age", 2700);
 #endif
 
 // True if this is the first time we are showing about:firstrun
diff --git a/mobile/xul/app/mobile.js b/mobile/xul/app/mobile.js
index 09471174419..81e3639da09 100644
--- a/mobile/xul/app/mobile.js
+++ b/mobile/xul/app/mobile.js
@@ -625,7 +625,7 @@ pref("urlclassifier.gethashtables", "goog-phish-shavar,goog-malware-shavar");
 // If an urlclassifier table has not been updated in this number of seconds,
 // a gethash request will be forced to check that the result is still in
 // the database.
-pref("urlclassifier.confirm-age", 2700);
+pref("urlclassifier.max-complete-age", 2700);
 
 // URL for checking the reason for a malware warning.
 pref("browser.safebrowsing.malware.reportURL", "http://safebrowsing.clients.google.com/safebrowsing/diagnostic?client=%NAME%&hl=%LOCALE%&site=");
diff --git a/toolkit/components/url-classifier/nsUrlClassifierDBService.cpp b/toolkit/components/url-classifier/nsUrlClassifierDBService.cpp
index 13c0df9963a..78d1da38f65 100644
--- a/toolkit/components/url-classifier/nsUrlClassifierDBService.cpp
+++ b/toolkit/components/url-classifier/nsUrlClassifierDBService.cpp
@@ -70,7 +70,7 @@ PRLogModuleInfo *gUrlClassifierDbServiceLog = nullptr;
 
 #define GETHASH_TABLES_PREF     "urlclassifier.gethashtables"
 
-#define CONFIRM_AGE_PREF        "urlclassifier.confirm-age"
+#define CONFIRM_AGE_PREF        "urlclassifier.max-complete-age"
 #define CONFIRM_AGE_DEFAULT_SEC (45 * 60)
 
 class nsUrlClassifierDBServiceWorker;
diff --git a/toolkit/components/url-classifier/tests/unit/test_partial.js b/toolkit/components/url-classifier/tests/unit/test_partial.js
index 69ba49af298..fc3600409c6 100644
--- a/toolkit/components/url-classifier/tests/unit/test_partial.js
+++ b/toolkit/components/url-classifier/tests/unit/test_partial.js
@@ -743,7 +743,7 @@ function testStaleList()
   };
 
   // Consider a match stale after one second.
-  prefBranch.setIntPref("urlclassifier.confirm-age", 1);
+  prefBranch.setIntPref("urlclassifier.max-complete-age", 1);
 
   // Apply the update.
   doStreamUpdate(update, function() {
@@ -752,7 +752,7 @@ function testStaleList()
       new Timer(3000, function() {
           // Now the lists should be marked stale.  Check assertions.
           checkAssertions(assertions, function() {
-              prefBranch.setIntPref("urlclassifier.confirm-age", 2700);
+              prefBranch.setIntPref("urlclassifier.max-complete-age", 2700);
               runNextTest();
             });
         }, updateError);
@@ -783,7 +783,7 @@ function testStaleListEmpty()
   };
 
   // Consider a match stale after one second.
-  prefBranch.setIntPref("urlclassifier.confirm-age", 1);
+  prefBranch.setIntPref("urlclassifier.max-complete-age", 1);
 
   // Apply the update.
   doStreamUpdate(update, function() {
@@ -792,7 +792,7 @@ function testStaleListEmpty()
       new Timer(3000, function() {
           // Now the lists should be marked stale.  Check assertions.
           checkAssertions(assertions, function() {
-              prefBranch.setIntPref("urlclassifier.confirm-age", 2700);
+              prefBranch.setIntPref("urlclassifier.max-complete-age", 2700);
               runNextTest();
             });
         }, updateError);