diff --git a/src/classes/DataBoard.js b/src/classes/DataBoard.js
index 0271cf7f3..b17a33b07 100644
--- a/src/classes/DataBoard.js
+++ b/src/classes/DataBoard.js
@@ -13,11 +13,10 @@ import { dict, HOUR } from "../platform/helpers";
 export default class DataBoard {
   static initClass() {
     this.keys = ['hiddenThreads', 'hiddenPosts', 'lastReadPosts', 'yourPosts', 'watchedThreads', 'watcherLastModified', 'customTitles'];
-
-    this.changes = [];
   }
 
   constructor(key, sync, dontClean) {
+    this.changes = [];
     this.onSync = this.onSync.bind(this);
     this.key = key;
     this.initData(Conf[this.key]);
@@ -48,15 +47,15 @@ export default class DataBoard {
 
   save(change, cb) {
     change();
-    DataBoard.changes.push(change);
+    this.changes.push(change);
     return $.get(this.key, { boards: dict() }, items => {
-      if (!DataBoard.changes.length) { return; }
+      if (!this.changes.length) { return; }
       const needSync = ((items[this.key].version || 0) > (this.data.version || 0));
       if (needSync) {
         this.initData(items[this.key]);
-        for (change of DataBoard.changes) { change(); }
+        for (change of this.changes) { change(); }
       }
-      DataBoard.changes = [];
+      this.changes = [];
       this.data.version = (this.data.version || 0) + 1;
       return $.set(this.key, this.data, () => {
         if (needSync) { this.sync?.(); }
@@ -69,7 +68,7 @@ export default class DataBoard {
     return $.get(this.key, { boards: dict() }, items => {
       if ((items[this.key].version || 0) > (this.data.version || 0)) {
         this.initData(items[this.key]);
-        for (var change of DataBoard.changes) { change(); }
+        for (var change of this.changes) { change(); }
         this.sync?.();
       }
       return cb?.();
diff --git a/src/platform/$.js b/src/platform/$.js
index 2ecdbc9e9..d230c447e 100644
--- a/src/platform/$.js
+++ b/src/platform/$.js
@@ -490,27 +490,16 @@ $.debounce = function(wait, fn) {
 };
 
 $.queueTask = (function() {
-  // inspired by https://www.w3.org/Bugs/Public/show_bug.cgi?id=15007
   const taskQueue = [];
   const execTask = function() {
-    const task = taskQueue.shift();
-    const func = task[0];
-    const args = Array.prototype.slice.call(task, 1);
-    return func.apply(func, args);
+    const [func, ...args] = taskQueue.shift();
+    func(...args);
+  };
+  return function() {
+    taskQueue.push(arguments);
+    // setTimeout is throttled in background tabs on firefox
+    Promise.resolve().then(execTask);
   };
-  if (window.MessageChannel) {
-    const taskChannel = new MessageChannel();
-    taskChannel.port1.onmessage = execTask;
-    return function() {
-      taskQueue.push(arguments);
-      return taskChannel.port2.postMessage(null);
-    };
-  } else { // XXX Firefox
-    return function() {
-      taskQueue.push(arguments);
-      return setTimeout(execTask, 0);
-    };
-  }
 })();
 
 $.global = function(fn, data) {