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diff --git a/toolkit/components/taskscheduler/TaskScheduler.sys.mjs b/toolkit/components/taskscheduler/TaskScheduler.sys.mjs
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+++ b/toolkit/components/taskscheduler/TaskScheduler.sys.mjs
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+/* -*- js-indent-level: 2; indent-tabs-mode: nil -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+import { AppConstants } from "resource://gre/modules/AppConstants.sys.mjs";
+import { XPCOMUtils } from "resource://gre/modules/XPCOMUtils.sys.mjs";
+
+const lazy = {};
+
+ChromeUtils.defineESModuleGetters(lazy, {
+  WinImpl: "resource://gre/modules/TaskSchedulerWinImpl.sys.mjs",
+  MacOSImpl: "resource://gre/modules/TaskSchedulerMacOSImpl.sys.mjs",
+});
+
+XPCOMUtils.defineLazyGetter(lazy, "gImpl", () => {
+  if (AppConstants.platform == "win") {
+    return lazy.WinImpl;
+  }
+
+  if (AppConstants.platform == "macosx") {
+    return lazy.MacOSImpl;
+  }
+
+  // Stubs for unsupported platforms
+  return {
+    registerTask() {},
+    deleteTask() {},
+    deleteAllTasks() {},
+  };
+});
+
+/**
+ * Interface to a system task scheduler, capable of running a command line at an interval
+ * independent of the application.
+ *
+ * The expected consumer of this component wants to run a periodic short-lived maintenance task.
+ * These periodic maintenance tasks will be per-OS-level user and run with the OS-level user's
+ * permissions.  (These still need to work across systems with multiple users and the various
+ * ownership and permission combinations that we see.)  This component does not help schedule
+ * maintenance daemons, meaning long-lived processes.
+ *
+ * Currently only implemented for Windows and macOS, on other platforms these calls do nothing.
+ *
+ * The implementation will only interact with tasks from the same install of this application.
+ * - On Windows the native tasks are named like "\<vendor>\<id> <install path hash>",
+ *   e.g. "\Mozilla\Task Identifier 308046B0AF4A39CB"
+ * - On macOS the native tasks are labeled like "<macOS bundle ID>.<install path hash>.<id>",
+ *   e.g. "org.mozilla.nightly.308046B0AF4A39CB.Task Identifier".
+ */
+export var TaskScheduler = {
+  MIN_INTERVAL_SECONDS: 1800,
+
+  /**
+   * Create a scheduled task that will run a command indepedent of the application.
+   *
+   * It will run every intervalSeconds seconds, starting intervalSeconds seconds from now.
+   *
+   * If the task is unable to run one or more scheduled times (e.g. if the computer is
+   * off, or the owning user is not logged in), then the next time a run is possible the task
+   * will be run once.
+   *
+   * An existing task with the same `id` will be replaced.
+   *
+   * Only one instance of the task will run at once, though this does not affect different
+   * tasks from the same application.
+   *
+   * @param id
+   *        A unique string (including a UUID is recommended) to distinguish the task among
+   *        other tasks from this installation.
+   *        This string will also be visible to system administrators, so it should be a legible
+   *        description, but it does not need to be localized.
+   *
+   * @param command
+   *        Full path to the executable to run.
+   *
+   * @param intervalSeconds
+   *        Interval at which to run the command, in seconds. Minimum 1800 (30 minutes).
+   *
+   * @param options
+   *        Optional, as are all of its properties:
+   *        {
+   *          args
+   *            Array of arguments to pass on the command line. Does not include the command
+   *            itself even if that is considered part of the command line. If missing, no
+   *            argument list is generated.
+   *
+   *          workingDirectory
+   *            Working directory for the command. If missing, no working directory is set.
+   *
+   *          description
+   *            A description string that will be visible to system administrators. This should
+   *            be localized. If missing, no description is set.
+   *
+   *          disabled
+   *            If true the task will be created disabled, so that it will not be run.
+   *            Ignored on macOS: see comments in TaskSchedulerMacOSImpl.jsm.
+   *            Default false, intended for tests.
+   *
+   *          executionTimeoutSec
+   *            Specifies how long (in seconds) the scheduled task can execute for before it is
+   *            automatically stopped by the task scheduler. If a value <= 0 is given, it will be
+   *            ignored.
+   *            This is not currently implemented on macOS.
+   *            On Windows, the default timeout is 72 hours.
+   *        }
+   * }
+   */
+  async registerTask(id, command, intervalSeconds, options) {
+    if (typeof id !== "string") {
+      throw new Error("id is not a string");
+    }
+    if (!Number.isInteger(intervalSeconds)) {
+      throw new Error("Interval is not an integer");
+    }
+    if (intervalSeconds < this.MIN_INTERVAL_SECONDS) {
+      throw new Error("Interval is too short");
+    }
+
+    return lazy.gImpl.registerTask(id, command, intervalSeconds, options);
+  },
+
+  /**
+   * Delete a scheduled task previously created with registerTask.
+   *
+   * @throws NS_ERROR_FILE_NOT_FOUND if the task does not exist.
+   */
+  async deleteTask(id) {
+    return lazy.gImpl.deleteTask(id);
+  },
+
+  /**
+   * Delete all tasks registered by this application.
+   */
+  async deleteAllTasks() {
+    return lazy.gImpl.deleteAllTasks();
+  },
+
+  /**
+   * Checks if a task exists.
+   *
+   * @param id
+   *        A string representing the identifier of the task to look for.
+   *
+   * @return
+   *        true if the task exists, otherwise false.
+   */
+  async taskExists(id) {
+    return lazy.gImpl.taskExists(id);
+  },
+};