diff --git a/.eslintrc.base.js b/.eslintrc.base.js
index 7f39e9c12..b4e93c1c9 100644
--- a/.eslintrc.base.js
+++ b/.eslintrc.base.js
@@ -72,12 +72,5 @@ module.exports = {
     // upgrading eslint and dependencies. This rule should be evaluated and
     // if agreeable turned on upstream in @metamask/eslint-config
     'import/no-named-as-default-member': 'off',
-
-    // This rule is set to off to avoid churn when upgrading eslint and its
-    // dependencies. This rule should be enabled and the failures fixed in
-    // a separate PR. This rule prevents adding file extensions to imports
-    // of the same type. E.G, not adding the '.js' extension to file names when
-    // inside a .js file.
-    'import/extensions': 'off',
   },
 };
diff --git a/development/build/scripts.js b/development/build/scripts.js
index 923ee7849..566d9c8ec 100644
--- a/development/build/scripts.js
+++ b/development/build/scripts.js
@@ -46,7 +46,7 @@ const metamaskrc = require('rc')('metamask', {
     'https://f59f3dd640d2429d9d0e2445a87ea8e1@sentry.io/273496',
 });
 
-const { streamFlatMap } = require('../stream-flat-map.js');
+const { streamFlatMap } = require('../stream-flat-map');
 const { BuildType } = require('../lib/build-type');
 
 const {
diff --git a/development/build/styles.js b/development/build/styles.js
index 926609dff..47c5e5c66 100644
--- a/development/build/styles.js
+++ b/development/build/styles.js
@@ -73,7 +73,7 @@ async function buildScssPipeline(src, dest, devMode, rtl) {
     // use our own compiler which runs sass in its own process
     // in order to not pollute the intrinsics
     // eslint-disable-next-line node/global-require
-    sass.compiler = require('./sass-compiler.js');
+    sass.compiler = require('./sass-compiler');
   }
   await pump(
     ...[
diff --git a/development/build/transforms/utils.js b/development/build/transforms/utils.js
index fb7f49c32..0f8172cd3 100644
--- a/development/build/transforms/utils.js
+++ b/development/build/transforms/utils.js
@@ -1,5 +1,5 @@
 const { ESLint } = require('eslint');
-const eslintrc = require('../../../.eslintrc.js');
+const eslintrc = require('../../../.eslintrc');
 
 eslintrc.overrides.forEach((override) => {
   const rules = override.rules ?? {};
diff --git a/development/highlights/index.js b/development/highlights/index.js
index 5ed891e5d..2b263005f 100644
--- a/development/highlights/index.js
+++ b/development/highlights/index.js
@@ -1,6 +1,6 @@
 const { promisify } = require('util');
 const exec = promisify(require('child_process').exec);
-const storybook = require('./storybook.js');
+const storybook = require('./storybook');
 
 module.exports = { getHighlights };
 
diff --git a/ui/components/app/transaction-activity-log/transaction-activity-log.container.test.js b/ui/components/app/transaction-activity-log/transaction-activity-log.container.test.js
index 17302ce9d..cb6dbeab0 100644
--- a/ui/components/app/transaction-activity-log/transaction-activity-log.container.test.js
+++ b/ui/components/app/transaction-activity-log/transaction-activity-log.container.test.js
@@ -8,7 +8,7 @@ jest.mock('react-redux', () => ({
   },
 }));
 
-require('./transaction-activity-log.container.js');
+require('./transaction-activity-log.container');
 
 describe('TransactionActivityLog container', () => {
   describe('mapStateToProps()', () => {
diff --git a/ui/components/app/user-preferenced-currency-input/user-preferenced-currency-input.container.test.js b/ui/components/app/user-preferenced-currency-input/user-preferenced-currency-input.container.test.js
index 75eca3bfc..93e3cb81b 100644
--- a/ui/components/app/user-preferenced-currency-input/user-preferenced-currency-input.container.test.js
+++ b/ui/components/app/user-preferenced-currency-input/user-preferenced-currency-input.container.test.js
@@ -8,7 +8,7 @@ jest.mock('react-redux', () => ({
   },
 }));
 
-require('./user-preferenced-currency-input.container.js');
+require('./user-preferenced-currency-input.container');
 
 describe('UserPreferencedCurrencyInput container', () => {
   describe('mapStateToProps()', () => {
diff --git a/ui/components/app/user-preferenced-token-input/user-preferenced-token-input.container.test.js b/ui/components/app/user-preferenced-token-input/user-preferenced-token-input.container.test.js
index 64c0e702e..8c94ffa44 100644
--- a/ui/components/app/user-preferenced-token-input/user-preferenced-token-input.container.test.js
+++ b/ui/components/app/user-preferenced-token-input/user-preferenced-token-input.container.test.js
@@ -8,7 +8,7 @@ jest.mock('react-redux', () => ({
   },
 }));
 
-require('./user-preferenced-token-input.container.js');
+require('./user-preferenced-token-input.container');
 
 describe('UserPreferencedTokenInput container', () => {
   describe('mapStateToProps()', () => {
diff --git a/ui/pages/send/send-content/add-recipient/add-recipient.container.test.js b/ui/pages/send/send-content/add-recipient/add-recipient.container.test.js
index 2d8dd59b0..a78e51134 100644
--- a/ui/pages/send/send-content/add-recipient/add-recipient.container.test.js
+++ b/ui/pages/send/send-content/add-recipient/add-recipient.container.test.js
@@ -40,7 +40,7 @@ jest.mock('../../../../ducks/send', () => ({
   getRecipient: (s) => `mockRecipient:${s}`,
 }));
 
-require('./add-recipient.container.js');
+require('./add-recipient.container');
 
 describe('add-recipient container', () => {
   describe('mapStateToProps()', () => {
diff --git a/ui/pages/send/send-content/send-amount-row/send-amount-row.container.test.js b/ui/pages/send/send-content/send-amount-row/send-amount-row.container.test.js
index 4911cb612..88b411b8e 100644
--- a/ui/pages/send/send-content/send-amount-row/send-amount-row.container.test.js
+++ b/ui/pages/send/send-content/send-amount-row/send-amount-row.container.test.js
@@ -15,7 +15,7 @@ jest.mock('../../../../ducks/send', () => ({
   updateSendAmount: jest.fn(),
 }));
 
-require('./send-amount-row.container.js');
+require('./send-amount-row.container');
 
 describe('send-amount-row container', () => {
   describe('mapDispatchToProps()', () => {
diff --git a/ui/pages/send/send-content/send-gas-row/send-gas-row.container.test.js b/ui/pages/send/send-content/send-gas-row/send-gas-row.container.test.js
index 198729f29..1838392c3 100644
--- a/ui/pages/send/send-content/send-gas-row/send-gas-row.container.test.js
+++ b/ui/pages/send/send-content/send-gas-row/send-gas-row.container.test.js
@@ -48,7 +48,7 @@ jest.mock('../../../../ducks/gas/gas.duck', () => ({
   setCustomGasLimit: jest.fn(),
 }));
 
-require('./send-gas-row.container.js');
+require('./send-gas-row.container');
 
 describe('send-gas-row container', () => {
   describe('mapDispatchToProps()', () => {
diff --git a/ui/pages/send/send-content/send-row-wrapper/send-row-error-message/send-row-error-message.container.test.js b/ui/pages/send/send-content/send-row-wrapper/send-row-error-message/send-row-error-message.container.test.js
index 23f1d2c68..cec2c2d8b 100644
--- a/ui/pages/send/send-content/send-row-wrapper/send-row-error-message/send-row-error-message.container.test.js
+++ b/ui/pages/send/send-content/send-row-wrapper/send-row-error-message/send-row-error-message.container.test.js
@@ -12,7 +12,7 @@ jest.mock('../../../../../ducks/send', () => ({
   getSendErrors: (s) => `mockErrors:${s}`,
 }));
 
-require('./send-row-error-message.container.js');
+require('./send-row-error-message.container');
 
 describe('send-row-error-message container', () => {
   describe('mapStateToProps()', () => {
diff --git a/ui/pages/send/send-footer/send-footer.container.test.js b/ui/pages/send/send-footer/send-footer.container.test.js
index d5eb9f8ab..abcf0f8b5 100644
--- a/ui/pages/send/send-footer/send-footer.container.test.js
+++ b/ui/pages/send/send-footer/send-footer.container.test.js
@@ -12,7 +12,7 @@ jest.mock('react-redux', () => ({
   },
 }));
 
-jest.mock('../../../store/actions.js', () => ({
+jest.mock('../../../store/actions', () => ({
   addToAddressBook: jest.fn(),
   cancelTx: jest.fn(),
 }));
@@ -31,12 +31,12 @@ jest.mock('../../../ducks/send', () => ({
   signTransaction: jest.fn(),
 }));
 
-jest.mock('../../../selectors/custom-gas.js', () => ({
+jest.mock('../../../selectors/custom-gas', () => ({
   getRenderableEstimateDataForSmallButtonsFromGWEI: (s) => [
     { gasEstimateType: `mockGasEstimateType:${s}` },
   ],
 }));
-require('./send-footer.container.js');
+require('./send-footer.container');
 
 describe('send-footer container', () => {
   describe('mapDispatchToProps()', () => {