Bug 305051 If the extensions.rdf is deleted and there are pending ops in extensions.cache the extension manager ui is empty. r+a=bsmedberg

toolkit/mozapps/extensions/src/nsExtensionManager.js.in

@@ -2336,6 +2336,10 @@ ExtensionManager.prototype = {
     if (iniExists)
       extensionsINI.remove(false);
 
+    // If the extensions datasource is missing remove the .cache file if it exists
+    if (!dsExists && cacheExists)
+      extensionsCache.remove(false);
+
     return true;
   },