--- a/mobile/android/chrome/content/browser.js
+++ b/mobile/android/chrome/content/browser.js
@@ -7207,17 +7207,17 @@ var Tabs = {
             }
           } catch (e) {}
         }
         break;
       case "network:link-status-changed":
         if (["down", "unknown", "up"].indexOf(aData) == -1) {
           return;
         }
-        this.useCache = (aData != "up");
+        this.useCache = (aData === "down");
         break;
     }
   },
 
   handleEvent: function(aEvent) {
     switch (aEvent.type) {
       case "pageshow":
         // Clear the domain cache whenever a page is loaded into any browser.