--- a/toolkit/components/satchel/FormHistory.jsm
+++ b/toolkit/components/satchel/FormHistory.jsm
@@ -862,23 +862,22 @@ function expireOldEntriesDeletion(aExpir
  * @param {number} aBeginningCount number of entries at first
  */
 function expireOldEntriesVacuum(aExpireTime, aBeginningCount) {
   FormHistory.count({}, {
     handleResult(aEndingCount) {
       if (aBeginningCount - aEndingCount > 500) {
         log("expireOldEntriesVacuum");
 
-        let stmt = dbCreateAsyncStatement("VACUUM");
-        stmt.executeAsync({
-          handleResult: NOOP,
-          handleError(aError) {
+        FormHistory.db.then(async conn => {
+          try {
+            await conn.executeCached("VACUUM");
+          } catch (e) {
             log("expireVacuumError");
-          },
-          handleCompletion: NOOP,
+          }
         });
       }
 
       sendNotification("formhistory-expireoldentries", aExpireTime);
     },
     handleError(aError) {
       log("expireEndCountFailure");
     },