diff --git a/desktop/app/src/ui/components/Glyph.tsx b/desktop/app/src/ui/components/Glyph.tsx
index 543ae3ea2..6b7525e78 100644
--- a/desktop/app/src/ui/components/Glyph.tsx
+++ b/desktop/app/src/ui/components/Glyph.tsx
@@ -9,7 +9,7 @@
 
 import React from 'react';
 import styled from '@emotion/styled';
-import {getIconURL} from '../../utils/icons';
+import {getIconURLSync} from '../../utils/icons';
 
 export type IconSize = 8 | 10 | 12 | 16 | 18 | 20 | 24 | 32;
 
@@ -121,7 +121,7 @@ export default class Glyph extends React.PureComponent<{
         color={color}
         size={size}
         title={title}
-        src={getIconURL(
+        src={getIconURLSync(
           variant === 'outline' ? `${name}-outline` : name,
           size,
           typeof window !== 'undefined' ? window.devicePixelRatio : 1,
diff --git a/desktop/app/src/utils/__tests__/icons.node.tsx b/desktop/app/src/utils/__tests__/icons.node.tsx
index eb52b7d50..6a9ec644e 100644
--- a/desktop/app/src/utils/__tests__/icons.node.tsx
+++ b/desktop/app/src/utils/__tests__/icons.node.tsx
@@ -7,7 +7,7 @@
  * @format
  */
 
-import {buildLocalIconPath, buildIconURL} from '../icons';
+import {buildLocalIconPath, buildIconURLSync} from '../icons';
 import * as path from 'path';
 
 test('filled icons get correct local path', () => {
@@ -21,14 +21,14 @@ test('outline icons get correct local path', () => {
 });
 
 test('filled icons get correct URL', () => {
-  const iconUrl = buildIconURL('star', 12, 2);
+  const iconUrl = buildIconURLSync('star', 12, 2);
   expect(iconUrl).toBe(
     'https://facebook.com/assets/?name=star&variant=filled&size=12&set=facebook_icons&density=2x',
   );
 });
 
 test('outline icons get correct URL', () => {
-  const iconUrl = buildIconURL('star-outline', 12, 2);
+  const iconUrl = buildIconURLSync('star-outline', 12, 2);
   expect(iconUrl).toBe(
     'https://facebook.com/assets/?name=star&variant=outline&size=12&set=facebook_icons&density=2x',
   );
diff --git a/desktop/app/src/utils/exportData.tsx b/desktop/app/src/utils/exportData.tsx
index 5a5cc812f..406fba042 100644
--- a/desktop/app/src/utils/exportData.tsx
+++ b/desktop/app/src/utils/exportData.tsx
@@ -589,7 +589,10 @@ export function importDataToStore(source: string, data: string, store: Store) {
 export const importFileToStore = (file: string, store: Store) => {
   fs.readFile(file, 'utf8', (err, data) => {
     if (err) {
-      console.error(`[exportData] Failed to write to file ${file}: `, err);
+      console.error(
+        `[exportData] importFileToStore for file ${file} failed:`,
+        err,
+      );
       return;
     }
     importDataToStore(file, data, store);
diff --git a/desktop/app/src/utils/icons.ts b/desktop/app/src/utils/icons.ts
index 5e9e058f8..24b5cdadd 100644
--- a/desktop/app/src/utils/icons.ts
+++ b/desktop/app/src/utils/icons.ts
@@ -7,6 +7,10 @@
  * @format
  */
 
+// We should get rid of sync use entirely but until then the
+// methods are marked as such.
+/* eslint-disable node/no-sync */
+
 import fs from 'fs';
 import path from 'path';
 // eslint-disable-next-line flipper/no-electron-remote-imports
@@ -26,7 +30,7 @@ export type Icons = {
 
 let _icons: Icons | undefined;
 
-export function getIcons(): Icons {
+export function getIconsSync(): Icons {
   return (
     _icons! ??
     (_icons = JSON.parse(fs.readFileSync(getIconsPath(), {encoding: 'utf8'})))
@@ -67,7 +71,7 @@ export function buildLocalIconURL(name: string, size: number, density: number) {
   return `icons/${getIconFileName(icon, size, density)}`;
 }
 
-export function buildIconURL(name: string, size: number, density: number) {
+export function buildIconURLSync(name: string, size: number, density: number) {
   const icon = getIconPartsFromName(name);
   // eslint-disable-next-line prettier/prettier
   const url = `https://facebook.com/assets/?name=${
@@ -77,7 +81,7 @@ export function buildIconURL(name: string, size: number, density: number) {
     }&size=${size}&set=facebook_icons&density=${density}x`;
   if (
     typeof window !== 'undefined' &&
-    (!getIcons()[name] || !getIcons()[name].includes(size))
+    (!getIconsSync()[name] || !getIconsSync()[name].includes(size))
   ) {
     // From utils/isProduction
     const isProduction = !/node_modules[\\/]electron[\\/]/.test(
@@ -85,7 +89,7 @@ export function buildIconURL(name: string, size: number, density: number) {
     );
 
     if (!isProduction) {
-      const existing = getIcons()[name] || (getIcons()[name] = []);
+      const existing = getIconsSync()[name] || (getIconsSync()[name] = []);
       if (!existing.includes(size)) {
         // Check if that icon actually exists!
         fetch(url)
@@ -96,7 +100,7 @@ export function buildIconURL(name: string, size: number, density: number) {
               existing.sort();
               fs.writeFileSync(
                 getIconsPath(),
-                JSON.stringify(getIcons(), null, 2),
+                JSON.stringify(getIconsSync(), null, 2),
                 'utf8',
               );
               console.warn(
@@ -122,7 +126,7 @@ export function buildIconURL(name: string, size: number, density: number) {
   return url;
 }
 
-export function getIconURL(name: string, size: number, density: number) {
+export function getIconURLSync(name: string, size: number, density: number) {
   if (name.indexOf('/') > -1) {
     return name;
   }
@@ -168,5 +172,5 @@ export function getIconURL(name: string, size: number, density: number) {
   ) {
     return buildLocalIconURL(name, size, density);
   }
-  return buildIconURL(name, requestedSize, density);
+  return buildIconURLSync(name, requestedSize, density);
 }
diff --git a/desktop/app/src/utils/info.tsx b/desktop/app/src/utils/info.tsx
index fbbb3e87e..779f800e8 100644
--- a/desktop/app/src/utils/info.tsx
+++ b/desktop/app/src/utils/info.tsx
@@ -7,6 +7,9 @@
  * @format
  */
 
+// Use of sync methods is cached.
+/* eslint-disable node/no-sync */
+
 import os from 'os';
 import isProduction from './isProduction';
 import fs from 'fs-extra';
diff --git a/desktop/app/src/utils/jsonFileReduxPersistStorage.tsx b/desktop/app/src/utils/jsonFileReduxPersistStorage.tsx
index 8185816f9..ded99fdbd 100644
--- a/desktop/app/src/utils/jsonFileReduxPersistStorage.tsx
+++ b/desktop/app/src/utils/jsonFileReduxPersistStorage.tsx
@@ -29,11 +29,12 @@ export default class JsonFileStorage {
     return readFile(this.filepath)
       .then((buffer) => buffer.toString())
       .then(this.deserializeValue)
-      .catch((e) => {
+      .catch(async (e) => {
         console.warn(
           `Failed to read settings file: "${this.filepath}". ${e}. Replacing file with default settings.`,
         );
-        return this.writeContents(prettyStringify({})).then(() => ({}));
+        await this.writeContents(prettyStringify({}));
+        return {};
       });
   }
 
diff --git a/desktop/app/src/utils/launcherSettingsStorage.tsx b/desktop/app/src/utils/launcherSettingsStorage.tsx
index bf2d05b4c..314c6ee45 100644
--- a/desktop/app/src/utils/launcherSettingsStorage.tsx
+++ b/desktop/app/src/utils/launcherSettingsStorage.tsx
@@ -7,7 +7,7 @@
  * @format
  */
 
-import fs from 'fs';
+import fs from 'fs-extra';
 import path from 'path';
 import TOML, {JsonMap} from '@iarna/toml';
 import {Storage} from 'redux-persist/es/types';
@@ -36,7 +36,7 @@ export default class LauncherSettingsStorage implements Storage {
 
   private async parseFile(): Promise<LauncherSettings> {
     try {
-      const content = fs.readFileSync(this.filepath).toString();
+      const content = fs.readFile(this.filepath).toString();
       return deserialize(content);
     } catch (e) {
       console.warn(
@@ -50,12 +50,15 @@ export default class LauncherSettingsStorage implements Storage {
   private async writeFile(value: LauncherSettings): Promise<void> {
     this.ensureDirExists();
     const content = serialize(value);
-    fs.writeFileSync(this.filepath, content);
+    return fs.writeFile(this.filepath, content);
   }
 
-  private ensureDirExists(): void {
+  private async ensureDirExists(): Promise<void> {
     const dir = path.dirname(this.filepath);
-    fs.existsSync(dir) || fs.mkdirSync(dir, {recursive: true});
+    const exists = await fs.pathExists(dir);
+    if (!exists) {
+      await fs.mkdir(dir, {recursive: true});
+    }
   }
 }
 
diff --git a/desktop/app/src/utils/processConfig.tsx b/desktop/app/src/utils/processConfig.tsx
index 32a728493..7cf0f9f03 100644
--- a/desktop/app/src/utils/processConfig.tsx
+++ b/desktop/app/src/utils/processConfig.tsx
@@ -7,6 +7,7 @@
  * @format
  */
 
+// eslint-disable-next-line flipper/no-electron-remote-imports
 import {remote} from 'electron';
 
 export type ProcessConfig = {
diff --git a/desktop/app/src/utils/restartFlipper.tsx b/desktop/app/src/utils/restartFlipper.tsx
index 241960477..324efd6f9 100644
--- a/desktop/app/src/utils/restartFlipper.tsx
+++ b/desktop/app/src/utils/restartFlipper.tsx
@@ -7,6 +7,7 @@
  * @format
  */
 
+// eslint-disable-next-line flipper/no-electron-remote-imports
 import {remote} from 'electron';
 import isProduction from './isProduction';
 
diff --git a/desktop/app/src/utils/screenshot.tsx b/desktop/app/src/utils/screenshot.tsx
index c3588d08c..ad9a19e55 100644
--- a/desktop/app/src/utils/screenshot.tsx
+++ b/desktop/app/src/utils/screenshot.tsx
@@ -12,6 +12,7 @@ import path from 'path';
 import BaseDevice from '../devices/BaseDevice';
 import {reportPlatformFailures} from 'flipper-common';
 import expandTilde from 'expand-tilde';
+// eslint-disable-next-line flipper/no-electron-remote-imports
 import {remote} from 'electron';
 import config from '../utils/processConfig';
 
diff --git a/desktop/app/src/utils/vscodeUtils.tsx b/desktop/app/src/utils/vscodeUtils.tsx
index 5f9893b20..620c215ab 100644
--- a/desktop/app/src/utils/vscodeUtils.tsx
+++ b/desktop/app/src/utils/vscodeUtils.tsx
@@ -13,7 +13,7 @@ import {getPreferredEditorUriScheme} from '../fb-stubs/user';
 let preferredEditorUriScheme: string | undefined = undefined;
 
 export function callVSCode(plugin: string, command: string, params?: string) {
-  getVSCodeUrl(plugin, command, params).then((url) =>
+  return getVSCodeUrl(plugin, command, params).then((url) =>
     getFlipperLib().openLink(url),
   );
 }
diff --git a/desktop/scripts/build-release.ts b/desktop/scripts/build-release.ts
index d7d06bbdb..6f30e0490 100755
--- a/desktop/scripts/build-release.ts
+++ b/desktop/scripts/build-release.ts
@@ -29,7 +29,11 @@ import {
   moveSourceMaps,
 } from './build-utils';
 import fetch from '@adobe/node-fetch-retry';
-import {getIcons, buildLocalIconPath, getIconURL} from '../app/src/utils/icons';
+import {
+  getIconsSync,
+  buildLocalIconPath,
+  getIconURLSync,
+} from '../app/src/utils/icons';
 import isFB from './isFB';
 import copyPackageWithDependencies from './copy-package-with-dependencies';
 import {staticDir, distDir} from './paths';
@@ -305,7 +309,7 @@ async function copyStaticFolder(buildFolder: string) {
 }
 
 function downloadIcons(buildFolder: string) {
-  const iconURLs = Object.entries(getIcons()).reduce<
+  const iconURLs = Object.entries(getIconsSync()).reduce<
     {
       name: string;
       size: number;
@@ -322,7 +326,7 @@ function downloadIcons(buildFolder: string) {
 
   return Promise.all(
     iconURLs.map(({name, size, density}) => {
-      const url = getIconURL(name, size, density);
+      const url = getIconURLSync(name, size, density);
       return fetch(url, {
         retryOptions: {
           // Be default, only 5xx are retried but we're getting the odd 404