--- a/toolkit/modules/Sqlite.jsm
+++ b/toolkit/modules/Sqlite.jsm
@@ -244,16 +244,18 @@ OpenedConnection.prototype = Object.free
    *
    * @return Promise<>
    */
   close: function () {
     if (!this._connection) {
       return Promise.resolve();
     }
 
+    this._log.debug("Closing.");
+
     // Abort in-progress transaction.
     if (this._inProgressTransaction) {
       this._log.warn("Transaction in progress at time of close.");
       try {
         this._connection.rollbackTransaction();
       } catch (ex) {
         this._log.warn("Error rolling back transaction: " +
                        CommonUtils.exceptionStr(ex));
@@ -280,16 +282,17 @@ OpenedConnection.prototype = Object.free
     this._cachedStatements.clear();
 
     // This guards against operations performed between the call to this
     // function and asyncClose() finishing. See also bug 726990.
     this._open = false;
 
     let deferred = Promise.defer();
 
+    this._log.debug("Calling asyncClose().");
     this._connection.asyncClose({
       complete: function () {
         this._log.info("Closed");
         this._connection = null;
         deferred.resolve();
       }.bind(this),
     });