E.
    //
    // Consumers should be aware that:
    //
    // * This blocks first startup window opening for new installs on Windows
    //   ONLY for the first created default profile
    // * If PREF_TIMEOUT elapses before all of these promises complete, the
    //   registered category entries might not have all had a chance to
    //   successfully complete before the first browser window appears.
    const CATEGORY_TASKS_ENABLED = Services.prefs.getBoolPref(
      PREF_CATEGORY_TASKS,
      false
    );
    let categoryTasksEndTime = null;
    if (CATEGORY_TASKS_ENABLED && AppConstants.MOZ_NORMANDY) {
      promises.push(
        normandyInitPromise.finally(() => {
          return lazy.BrowserUtils.callModulesFromCategory({
            categoryName: CATEGORY_NAME,
            profileMarker: "first-startup-new-profile-tasks",
            idleDispatch: false,
          }).finally(() => {
            categoryTasksEndTime = ChromeUtils.now();
          });
        })
      );
    }

    if (promises.length) {
      Promise.allSettled(promises).then(() => (initialized = true));

      this.elapsed = 0;
      Services.tm.spinEventLoopUntil("FirstStartup.sys.mjs:init", () => {
        this.elapsed = Math.ceil(ChromeUtils.now() - startingTime);
        if (this.elapsed >= timeout) {
          this._state = this.TIMED_OUT;
          return true;
        } else if (initialized) {
          this._state = this.SUCCESS;
          return true;
        }
        return false;
      });
    } else {
      this._state = this.UNSUPPORTED;
    }

    if (AppConstants.MOZ_NORMANDY) {
      Glean.firstStartup.normandyInitTime.set(
        Math.ceil(normandyInitEndTime || ChromeUtils.now() - startingTime)
      );
    }

    if (AppConstants.MOZ_UPDATE_AGENT) {
      Glean.firstStartup.deleteTasksTime.set(
        Math.ceil(deleteTasksEndTime || ChromeUtils.now() - startingTime)
      );
    }

    if (CATEGORY_TASKS_ENABLED) {
      Glean.firstStartup.categoryTasksTime.set(
        Math.ceil(categoryTasksEndTime || ChromeUtils.now() - startingTime)
      );
    }

    Glean.firstStartup.statusCode.set(this._state);
    Glean.firstStartup.elapsed.set(this.elapsed);
    GleanPings.firstStartup.submit();
  },

  get state() {
    return this._state;
  },

  /**
   * For testing only. This puts us back into the initial NOT_STARTED state.
   */
  resetForTesting() {
    this._state = this.NOT_STARTED;
  },
};
PK