diff --git a/.eslintrc.json b/.eslintrc.json
--- a/.eslintrc.json
+++ b/.eslintrc.json
@@ -36,6 +36,7 @@
     "react/prop-types": ["error", { "skipUndeclared": true }],
     "no-shadow": 1,
     "no-var": "error",
+    "import/extensions": ["error", "always"],
     "import/order": [
       "warn",
       {
diff --git a/desktop/src/auto-update.js b/desktop/src/auto-update.js
--- a/desktop/src/auto-update.js
+++ b/desktop/src/auto-update.js
@@ -1,5 +1,6 @@
 // @flow
 
+// eslint-disable-next-line import/extensions
 import { app, ipcMain, autoUpdater } from 'electron/main';
 
 const getUpdateUrl = version =>
diff --git a/desktop/src/main.js b/desktop/src/main.js
--- a/desktop/src/main.js
+++ b/desktop/src/main.js
@@ -8,6 +8,7 @@
   ipcMain,
   systemPreferences,
   autoUpdater,
+  // eslint-disable-next-line import/extensions
 } from 'electron/main';
 import fs from 'fs';
 import path from 'path';
diff --git a/desktop/src/preload.js b/desktop/src/preload.js
--- a/desktop/src/preload.js
+++ b/desktop/src/preload.js
@@ -1,5 +1,6 @@
 // @flow
 
+// eslint-disable-next-line import/extensions
 import { contextBridge, ipcRenderer } from 'electron/renderer';
 
 import type { ElectronBridge } from 'lib/types/electron-types.js';
diff --git a/keyserver/src/responders/landing-handler.js b/keyserver/src/responders/landing-handler.js
--- a/keyserver/src/responders/landing-handler.js
+++ b/keyserver/src/responders/landing-handler.js
@@ -1,9 +1,10 @@
 // @flow
 
-import html from 'common-tags/lib/html';
+import html from 'common-tags/lib/html/index.js';
 import type { $Response, $Request } from 'express';
 import fs from 'fs';
 import * as React from 'react';
+// eslint-disable-next-line import/extensions
 import ReactDOMServer from 'react-dom/server';
 import { promisify } from 'util';
 
diff --git a/keyserver/src/responders/website-responders.js b/keyserver/src/responders/website-responders.js
--- a/keyserver/src/responders/website-responders.js
+++ b/keyserver/src/responders/website-responders.js
@@ -1,10 +1,11 @@
 // @flow
 
-import html from 'common-tags/lib/html';
+import html from 'common-tags/lib/html/index.js';
 import type { $Response, $Request } from 'express';
 import fs from 'fs';
 import _keyBy from 'lodash/fp/keyBy.js';
 import * as React from 'react';
+// eslint-disable-next-line import/extensions
 import ReactDOMServer from 'react-dom/server';
 import { promisify } from 'util';
 
diff --git a/landing/script.js b/landing/script.js
--- a/landing/script.js
+++ b/landing/script.js
@@ -6,6 +6,7 @@
 
 import invariant from 'invariant';
 import React from 'react';
+// eslint-disable-next-line import/extensions
 import { hydrateRoot } from 'react-dom/client';
 
 import Root from './root.js';
diff --git a/lib/utils/wagmi-utils.js b/lib/utils/wagmi-utils.js
--- a/lib/utils/wagmi-utils.js
+++ b/lib/utils/wagmi-utils.js
@@ -1,7 +1,9 @@
 // @flow
 
 import { chain, configureChains, createClient } from 'wagmi';
+// eslint-disable-next-line import/extensions
 import { alchemyProvider } from 'wagmi/providers/alchemy';
+// eslint-disable-next-line import/extensions
 import { publicProvider } from 'wagmi/providers/public';
 
 // details can be found https://0.6.x.wagmi.sh/docs/providers/configuring-chains
diff --git a/native/components/swipeable.js b/native/components/swipeable.js
--- a/native/components/swipeable.js
+++ b/native/components/swipeable.js
@@ -2,6 +2,7 @@
 
 import * as React from 'react';
 import { Animated, View } from 'react-native';
+// eslint-disable-next-line import/extensions
 import SwipeableComponent from 'react-native-gesture-handler/Swipeable';
 import { useSelector } from 'react-redux';
 
diff --git a/native/navigation/app-navigator.react.js b/native/navigation/app-navigator.react.js
--- a/native/navigation/app-navigator.react.js
+++ b/native/navigation/app-navigator.react.js
@@ -3,7 +3,7 @@
 import * as SplashScreen from 'expo-splash-screen';
 import * as React from 'react';
 import { useSelector } from 'react-redux';
-import { PersistGate } from 'redux-persist/integration/react';
+import { PersistGate } from 'redux-persist/es/integration/react.js';
 
 import ActionResultModal from './action-result-modal.react.js';
 import { CommunityDrawerNavigator } from './community-drawer-navigator.react.js';
diff --git a/native/push/push-handler.react.js b/native/push/push-handler.react.js
--- a/native/push/push-handler.react.js
+++ b/native/push/push-handler.react.js
@@ -46,7 +46,7 @@
   iosPushPermissionResponseReceived,
   CommIOSNotifications,
   getCommIOSNotificationsEventEmitter,
-} from './ios';
+} from './ios.js';
 import {
   type MessageListParams,
   useNavigateToThread,
diff --git a/native/redux/dev-tools.js b/native/redux/dev-tools.js
--- a/native/redux/dev-tools.js
+++ b/native/redux/dev-tools.js
@@ -11,7 +11,7 @@
 // can no longer rely on the debugger to set these globals. We have to set them
 // ourselves to work with remote-redux-devtools
 if (__DEV__ && global.HermesInternal && !global.__REDUX_DEVTOOLS_EXTENSION__) {
-  const { connect } = require('remotedev/src');
+  const { connect } = require('remotedev/src/index.js');
   global.__REDUX_DEVTOOLS_EXTENSION__ = {
     connect: ({ name }) =>
       connect({
diff --git a/native/redux/redux-setup.js b/native/redux/redux-setup.js
--- a/native/redux/redux-setup.js
+++ b/native/redux/redux-setup.js
@@ -514,7 +514,7 @@
 
 let composeFunc = compose;
 if (__DEV__ && global.HermesInternal) {
-  const { composeWithDevTools } = require('remote-redux-devtools/src');
+  const { composeWithDevTools } = require('remote-redux-devtools/src/index.js');
   composeFunc = composeWithDevTools({
     name: 'Redux',
     hostname: getDevServerHostname(),
diff --git a/native/root.react.js b/native/root.react.js
--- a/native/root.react.js
+++ b/native/root.react.js
@@ -16,7 +16,7 @@
   initialWindowMetrics,
 } from 'react-native-safe-area-context';
 import { Provider } from 'react-redux';
-import { PersistGate as ReduxPersistGate } from 'redux-persist/integration/react';
+import { PersistGate as ReduxPersistGate } from 'redux-persist/es/integration/react.js';
 
 import { ENSCacheProvider } from 'lib/components/ens-cache-provider.react.js';
 import { actionLogger } from 'lib/utils/action-logger.js';
diff --git a/native/types/react-native.js b/native/types/react-native.js
--- a/native/types/react-native.js
+++ b/native/types/react-native.js
@@ -7,21 +7,20 @@
   Layout,
   LayoutEvent,
   ScrollEvent,
-} from 'react-native/Libraries/Types/CoreEventTypes';
+} from 'react-native/Libraries/Types/CoreEventTypes.js';
 
 export type {
   ContentSizeChangeEvent,
   KeyPressEvent,
   BlurEvent,
-} from 'react-native/Libraries/Components/TextInput/TextInput';
+  SelectionChangeEvent,
+} from 'react-native/Libraries/Components/TextInput/TextInput.js';
 
-export type { SelectionChangeEvent } from 'react-native/Libraries/Components/TextInput/TextInput';
+export type { NativeMethods } from 'react-native/Libraries/Renderer/shims/ReactNativeTypes.js';
 
-export type { NativeMethods } from 'react-native/Libraries/Renderer/shims/ReactNativeTypes';
+export type { KeyboardEvent } from 'react-native/Libraries/Components/Keyboard/Keyboard.js';
 
-export type { KeyboardEvent } from 'react-native/Libraries/Components/Keyboard/Keyboard';
-
-export type { EventSubscription } from 'react-native/Libraries/vendor/emitter/EventEmitter';
+export type { EventSubscription } from 'react-native/Libraries/vendor/emitter/EventEmitter.js';
 
 export type AnimatedValue = ReactNativeAnimatedValue;
 
diff --git a/native/utils/dev-hostname.js b/native/utils/dev-hostname.js
--- a/native/utils/dev-hostname.js
+++ b/native/utils/dev-hostname.js
@@ -22,7 +22,7 @@
     // example of native/facts/network.json:
     // { "natDevHostname": "192.168.1.x" }
     // $FlowExpectedError: It's a conditional require so the file may not exist
-    const hostname: string = require('../facts/network').natDevHostname;
+    const hostname: string = require('../facts/network.json').natDevHostname;
     warnNatDevHostnameUndefined = false;
     return hostname;
   } catch (e) {
diff --git a/scripts/get_clang_paths_cli.js b/scripts/get_clang_paths_cli.js
--- a/scripts/get_clang_paths_cli.js
+++ b/scripts/get_clang_paths_cli.js
@@ -1,6 +1,6 @@
 // @flow
 
-const { clangPaths } = require('./get_clang_paths');
+const { clangPaths } = require('./get_clang_paths.js');
 
 (() => {
   let command = '(';
diff --git a/web/account/siwe-button.react.js b/web/account/siwe-button.react.js
--- a/web/account/siwe-button.react.js
+++ b/web/account/siwe-button.react.js
@@ -1,7 +1,7 @@
 // @flow
 
 import * as React from 'react';
-import { FaEthereum } from 'react-icons/fa';
+import { FaEthereum } from 'react-icons/fa/index.js';
 
 import css from './siwe.css';
 import Button from '../components/button.react.js';
diff --git a/web/chat/chat-thread-list-see-more-sidebars.react.js b/web/chat/chat-thread-list-see-more-sidebars.react.js
--- a/web/chat/chat-thread-list-see-more-sidebars.react.js
+++ b/web/chat/chat-thread-list-see-more-sidebars.react.js
@@ -2,7 +2,7 @@
 
 import classNames from 'classnames';
 import * as React from 'react';
-import { IoIosMore } from 'react-icons/io';
+import { IoIosMore } from 'react-icons/io/index.js';
 
 import { useModalContext } from 'lib/components/modal-provider.react.js';
 import type { ThreadInfo } from 'lib/types/thread-types.js';
diff --git a/web/root.js b/web/root.js
--- a/web/root.js
+++ b/web/root.js
@@ -6,8 +6,8 @@
 import { createStore, applyMiddleware, type Store } from 'redux';
 import { composeWithDevTools } from 'redux-devtools-extension/logOnlyInProduction.js';
 import { persistReducer, persistStore } from 'redux-persist';
-import { PersistGate } from 'redux-persist/integration/react';
-import storage from 'redux-persist/lib/storage';
+import { PersistGate } from 'redux-persist/es/integration/react.js';
+import storage from 'redux-persist/es/storage/index.js';
 import thunk from 'redux-thunk';
 
 import { reduxLoggerMiddleware } from 'lib/utils/action-logger.js';
diff --git a/web/script.js b/web/script.js
--- a/web/script.js
+++ b/web/script.js
@@ -4,6 +4,7 @@
 
 import invariant from 'invariant';
 import React from 'react';
+// eslint-disable-next-line import/extensions
 import { hydrateRoot } from 'react-dom/client';
 
 import Root from './root.js';