diff --git a/frontend/before-tests.js b/frontend/before-tests.js
index 10fe31fc6a5..4e06289506a 100644
--- a/frontend/before-tests.js
+++ b/frontend/before-tests.js
@@ -2,8 +2,35 @@
 
 import { configure } from 'enzyme';
 import * as Adapter from '@wojtekmaj/enzyme-adapter-react-17';
+import { URLSearchParams } from 'url';
+import fetch, { Headers } from 'node-fetch';
 
-import 'url-search-params-polyfill';
+// FIXME: Remove when jest is updated to at least 25.1.0 -- see https://github.com/jsdom/jsdom/issues/1555
+Element.prototype.closest = function (this, selector) {
+  // eslint-disable-next-line consistent-this
+  let el = this;
+  while (el) {
+    if (el.matches(selector)) {
+      return el;
+    }
+    el = el.parentElement;
+  }
+  return null;
+};
+// FIXME: Remove when jest is updated to at least 25
+Object.defineProperty(window, 'Headers', {
+  value: Headers,
+  writable: true,
+});
+// FIXME: Remove when jest is updated to at least 22
+Object.defineProperty(window, 'URLSearchParams', {
+  value: URLSearchParams,
+  writable: true,
+});
+Object.defineProperty(window, 'fetch', {
+  value: fetch,
+  writable: true,
+});
 
 // http://airbnb.io/enzyme/docs/installation/index.html#working-with-react-16
 configure({ adapter: new Adapter() });
diff --git a/frontend/package.json b/frontend/package.json
index c3daebd3610..2cb927b0c60 100644
--- a/frontend/package.json
+++ b/frontend/package.json
@@ -153,7 +153,6 @@
     "@patternfly/react-user-feedback": "^6.1.0-prerelease.1",
     "@patternfly/react-virtualized-extension": "^6.0.0",
     "@rjsf/core": "^2.5.1",
-    "abort-controller": "3.0.0",
     "ajv": "^6.12.3",
     "apollo-cache-inmemory": "^1.6.5",
     "apollo-client": "^2.6.8",
@@ -178,7 +177,7 @@
     "i18next-v4-format-converter": "^1.0.3",
     "immutable": "3.x",
     "istextorbinary": "^9.5.0",
-    "js-base64": "^2.5.1",
+    "js-base64": "^3.7.7",
     "js-yaml": "^3.13.1",
     "json-schema": "^0.3.0",
     "lodash-es": "^4.17.21",
@@ -215,11 +214,8 @@
     "semver": "6.x",
     "showdown": "1.8.6",
     "subscriptions-transport-ws": "^0.9.16",
-    "text-encoding": "0.x",
     "typesafe-actions": "^4.2.1",
-    "url-search-params-polyfill": "2.x",
     "victory": "^37.3.6",
-    "whatwg-fetch": "2.x",
     "xterm": "^4.10.0",
     "xterm-addon-attach": "0.6.0",
     "xterm-addon-fit": "0.5.0",
@@ -258,8 +254,6 @@
     "@types/semver": "^6.0.0",
     "@types/showdown": "1.9.4",
     "@wojtekmaj/enzyme-adapter-react-17": "^0.4.1",
-    "acorn": "^7.0.0",
-    "acorn-jsx": "5.2.0",
     "axe-core": "^4.10.2",
     "babel-loader": "^8.2.1",
     "browser-env": "3.x",
diff --git a/frontend/packages/console-dynamic-plugin-sdk/scripts/package-definitions.ts b/frontend/packages/console-dynamic-plugin-sdk/scripts/package-definitions.ts
index de93130b41b..aa31e0371a0 100644
--- a/frontend/packages/console-dynamic-plugin-sdk/scripts/package-definitions.ts
+++ b/frontend/packages/console-dynamic-plugin-sdk/scripts/package-definitions.ts
@@ -124,7 +124,7 @@ export const getCorePackage: GetPackageDefinition = (
       ...parseSharedModuleDeps(rootPackage, missingDepCallback),
       ...parseDeps(
         rootPackage,
-        ['classnames', 'immutable', 'reselect', 'typesafe-actions', 'whatwg-fetch'],
+        ['classnames', 'immutable', 'reselect', 'typesafe-actions'],
         missingDepCallback,
       ),
       ...parseDepsAs(rootPackage, { 'lodash-es': 'lodash' }, missingDepCallback),
diff --git a/frontend/packages/console-dynamic-plugin-sdk/src/utils/fetch/console-fetch.ts b/frontend/packages/console-dynamic-plugin-sdk/src/utils/fetch/console-fetch.ts
index 788c4349752..507915a5bf1 100644
--- a/frontend/packages/console-dynamic-plugin-sdk/src/utils/fetch/console-fetch.ts
+++ b/frontend/packages/console-dynamic-plugin-sdk/src/utils/fetch/console-fetch.ts
@@ -1,5 +1,4 @@
 import * as _ from 'lodash';
-import 'whatwg-fetch';
 import { getUtilsConfig } from '../../app/configSetup';
 import { setAdmissionWebhookWarning } from '../../app/core/actions';
 import storeHandler from '../../app/storeHandler';
diff --git a/frontend/packages/git-service/src/services/bitbucket-service.ts b/frontend/packages/git-service/src/services/bitbucket-service.ts
index 2527c655374..ef564ef468a 100644
--- a/frontend/packages/git-service/src/services/bitbucket-service.ts
+++ b/frontend/packages/git-service/src/services/bitbucket-service.ts
@@ -1,6 +1,5 @@
 import { Base64 } from 'js-base64';
 import * as ParseBitbucketUrl from 'parse-bitbucket-url';
-import 'whatwg-fetch';
 import { consoleFetchJSON } from '@console/dynamic-plugin-sdk/src/lib-core';
 import { DevConsoleEndpointResponse } from '@console/shared/src';
 import {
diff --git a/frontend/packages/git-service/src/services/gitea-service.ts b/frontend/packages/git-service/src/services/gitea-service.ts
index 84b2f821574..05cfebd070e 100644
--- a/frontend/packages/git-service/src/services/gitea-service.ts
+++ b/frontend/packages/git-service/src/services/gitea-service.ts
@@ -1,7 +1,6 @@
 import * as GitUrlParse from 'git-url-parse';
 import { Base64 } from 'js-base64';
 import * as _ from 'lodash';
-import 'whatwg-fetch';
 import { consoleFetchJSON } from '@console/dynamic-plugin-sdk/src/lib-core';
 import {
   BranchList,
diff --git a/frontend/packages/pipelines-plugin/src/components/quicksearch/__tests__/PipelineQuickSearchVersionDropdown.spec.tsx b/frontend/packages/pipelines-plugin/src/components/quicksearch/__tests__/PipelineQuickSearchVersionDropdown.spec.tsx
index 9247cd1379c..2faed2e5c6a 100644
--- a/frontend/packages/pipelines-plugin/src/components/quicksearch/__tests__/PipelineQuickSearchVersionDropdown.spec.tsx
+++ b/frontend/packages/pipelines-plugin/src/components/quicksearch/__tests__/PipelineQuickSearchVersionDropdown.spec.tsx
@@ -13,19 +13,6 @@ import PipelineQuickSearchVersionDropdown from '../PipelineQuickSearchVersionDro
 
 configure({ testIdAttribute: 'data-test' });
 
-// FIXME Remove this code when jest is updated to at least 25.1.0 -- see https://github.com/jsdom/jsdom/issues/1555
-if (!Element.prototype.closest) {
-  Element.prototype.closest = function (this: Element, selector: string) {
-    // eslint-disable-next-line @typescript-eslint/no-this-alias, consistent-this
-    let el: Element | null = this;
-    while (el) {
-      if (el.matches(selector)) return el;
-      el = el.parentElement;
-    }
-    return null;
-  };
-}
-
 describe('pipelineQuickSearchVersionDropdown', () => {
   const onChange = jest.fn();
   const versionDropdownProps = {
diff --git a/frontend/packages/pipelines-plugin/src/components/quicksearch/__tests__/PipelineQuicksearchDetails.spec.tsx b/frontend/packages/pipelines-plugin/src/components/quicksearch/__tests__/PipelineQuicksearchDetails.spec.tsx
index 72b6c4005dd..8285cb952d6 100644
--- a/frontend/packages/pipelines-plugin/src/components/quicksearch/__tests__/PipelineQuicksearchDetails.spec.tsx
+++ b/frontend/packages/pipelines-plugin/src/components/quicksearch/__tests__/PipelineQuicksearchDetails.spec.tsx
@@ -28,19 +28,6 @@ jest.mock('@console/shared/src/hooks/useTelemetry', () => ({
   useTelemetry: () => {},
 }));
 
-// FIXME Remove this code when jest is updated to at least 25.1.0 -- see https://github.com/jsdom/jsdom/issues/1555
-if (!Element.prototype.closest) {
-  Element.prototype.closest = function (this: Element, selector: string) {
-    // eslint-disable-next-line @typescript-eslint/no-this-alias, consistent-this
-    let el: Element | null = this;
-    while (el) {
-      if (el.matches(selector)) return el;
-      el = el.parentElement;
-    }
-    return null;
-  };
-}
-
 beforeEach(() => {
   coFetchMock.mockClear();
   coFetchMock.mockReturnValue(
diff --git a/frontend/packages/topology/src/filters/__tests__/FilterDropdown.spec.tsx b/frontend/packages/topology/src/filters/__tests__/FilterDropdown.spec.tsx
index 50eef2f03bf..1985a7d5ec4 100644
--- a/frontend/packages/topology/src/filters/__tests__/FilterDropdown.spec.tsx
+++ b/frontend/packages/topology/src/filters/__tests__/FilterDropdown.spec.tsx
@@ -13,19 +13,6 @@ jest.mock('@console/shared/src/hooks/useTelemetry', () => ({
   useTelemetry: () => {},
 }));
 
-// FIXME Remove this code when jest is updated to at least 25.1.0 -- see https://github.com/jsdom/jsdom/issues/1555
-if (!Element.prototype.closest) {
-  Element.prototype.closest = function (this: Element, selector: string) {
-    // eslint-disable-next-line @typescript-eslint/no-this-alias, consistent-this
-    let el: Element | null = this;
-    while (el) {
-      if (el.matches(selector)) return el;
-      el = el.parentElement;
-    }
-    return null;
-  };
-}
-
 describe(FilterDropdown.displayName, () => {
   let dropdownFilter: DisplayFilters;
   let onChange: () => void;
diff --git a/frontend/packages/topology/src/filters/__tests__/KindFilterDropdown.spec.tsx b/frontend/packages/topology/src/filters/__tests__/KindFilterDropdown.spec.tsx
index c36e5eb79e0..88ae6711a3a 100644
--- a/frontend/packages/topology/src/filters/__tests__/KindFilterDropdown.spec.tsx
+++ b/frontend/packages/topology/src/filters/__tests__/KindFilterDropdown.spec.tsx
@@ -4,19 +4,6 @@ import { DisplayFilters, TopologyDisplayFilterType } from '../../topology-types'
 import { DEFAULT_TOPOLOGY_FILTERS } from '../const';
 import KindFilterDropdown from '../KindFilterDropdown';
 
-// FIXME Remove this code when jest is updated to at least 25.1.0 -- see https://github.com/jsdom/jsdom/issues/1555
-if (!Element.prototype.closest) {
-  Element.prototype.closest = function (this: Element, selector: string) {
-    // eslint-disable-next-line @typescript-eslint/no-this-alias, consistent-this
-    let el: Element | null = this;
-    while (el) {
-      if (el.matches(selector)) return el;
-      el = el.parentElement;
-    }
-    return null;
-  };
-}
-
 describe(KindFilterDropdown.displayName, () => {
   let dropdownFilter: DisplayFilters;
   let onChange: () => void;
diff --git a/frontend/public/actions/ui.ts b/frontend/public/actions/ui.ts
index 34cf5fcfbaf..ee8052391e6 100644
--- a/frontend/public/actions/ui.ts
+++ b/frontend/public/actions/ui.ts
@@ -215,17 +215,7 @@ export const setActiveNamespace = (namespace: string = '') => {
 };
 
 export const startImpersonate = (kind: string, name: string) => async (dispatch, getState) => {
-  let textEncoder;
-  try {
-    textEncoder = new TextEncoder();
-  } catch (e) {
-    // eslint-disable-next-line no-console
-    console.info('Browser lacks TextEncoder. Falling back to polyfill.', e);
-  }
-
-  if (!textEncoder) {
-    textEncoder = await import('text-encoding').then((module) => new module.TextEncoder('utf-8'));
-  }
+  const textEncoder = new TextEncoder();
 
   const imp = getImpersonate(getState());
   if ((imp?.name && imp.name !== name) || (imp?.kind && imp.kind !== kind)) {
@@ -238,9 +228,9 @@ export const startImpersonate = (kind: string, name: string) => async (dispatch,
    * Subprotocols are comma-separated, so commas aren't allowed. Also "="
    * and "/" aren't allowed, so base64 but replace illegal chars.
    */
-  let encodedName = textEncoder.encode(name);
-  encodedName = Base64.encode(String.fromCharCode.apply(String, encodedName));
-  encodedName = encodedName.replace(/=/g, '_').replace(/\//g, '-');
+  const encodedName = Base64.encode(String.fromCharCode.apply(String, textEncoder.encode(name)))
+    .replace(/=/g, '_')
+    .replace(/\//g, '-');
 
   let subprotocols;
   if (kind === 'User') {
diff --git a/frontend/public/components/app.jsx b/frontend/public/components/app.jsx
index 913d5926746..5a8ed43aecb 100644
--- a/frontend/public/components/app.jsx
+++ b/frontend/public/components/app.jsx
@@ -7,8 +7,6 @@ import { linkify } from 'react-linkify';
 import { Provider, useSelector, useDispatch } from 'react-redux';
 import { Router } from 'react-router-dom';
 import { useParams, useLocation, CompatRouter, Routes, Route } from 'react-router-dom-v5-compat';
-// AbortController is not supported in some older browser versions
-import 'abort-controller/polyfill';
 import store, { applyReduxExtensions } from '../redux';
 import { useTranslation } from 'react-i18next';
 import { coFetchJSON, appInternalFetch } from '../co-fetch';
@@ -58,7 +56,7 @@ import { useFlag } from '@console/shared/src/hooks/flag';
 import Lightspeed from '@console/app/src/components/lightspeed/Lightspeed';
 import { ThemeProvider } from './ThemeProvider';
 import { init as initI18n } from '../i18n';
-import { Page, SkipToContent, AlertVariant } from '@patternfly/react-core'; // PF4 Imports
+import { Page, SkipToContent, AlertVariant } from '@patternfly/react-core';
 import { AuthenticationErrorPage } from './error';
 import '../vendor.scss';
 import '../style.scss';
@@ -67,8 +65,6 @@ import '@patternfly/quickstarts/dist/quickstarts.min.css';
 const PF_BREAKPOINT_MD = 768;
 const PF_BREAKPOINT_XL = 1200;
 const NOTIFICATION_DRAWER_BREAKPOINT = 1800;
-// Edge lacks URLSearchParams
-import 'url-search-params-polyfill';
 import { withoutSensitiveInformations, getTelemetryTitle } from './utils/telemetry';
 import { graphQLReady } from '../graphql/client';
 import { AdmissionWebhookWarningNotifications } from '@console/app/src/components/admission-webhook-warnings/AdmissionWebhookWarningNotifications';
diff --git a/frontend/public/components/utils/__tests__/single-typeahead-dropdown.spec.tsx b/frontend/public/components/utils/__tests__/single-typeahead-dropdown.spec.tsx
index 255ccf46919..6ed2c2df478 100644
--- a/frontend/public/components/utils/__tests__/single-typeahead-dropdown.spec.tsx
+++ b/frontend/public/components/utils/__tests__/single-typeahead-dropdown.spec.tsx
@@ -3,21 +3,6 @@ import { SingleTypeaheadDropdown } from '../single-typeahead-dropdown';
 import { act } from 'react-dom/test-utils';
 import { Button, Select, SelectOption } from '@patternfly/react-core';
 
-// FIXME Remove this code when jest is updated to at least 25.1.0 -- see https://github.com/jsdom/jsdom/issues/1555
-if (!Element.prototype.closest) {
-  Element.prototype.closest = function (this: Element, selector: string) {
-    // eslint-disable-next-line @typescript-eslint/no-this-alias, consistent-this
-    let el: Element | null = this;
-    while (el) {
-      if (el.matches(selector)) {
-        return el;
-      }
-      el = el.parentElement;
-    }
-    return null;
-  };
-}
-
 describe('SingleTypeaheadDropdown', () => {
   let onChange: jest.Mock;
 
diff --git a/frontend/yarn.lock b/frontend/yarn.lock
index df8a1ff6a17..510515899f8 100644
--- a/frontend/yarn.lock
+++ b/frontend/yarn.lock
@@ -3295,7 +3295,7 @@ abab@^2.0.0:
   resolved "https://registry.yarnpkg.com/abab/-/abab-2.0.0.tgz#aba0ab4c5eee2d4c79d3487d85450fb2376ebb0f"
   integrity sha512-sY5AXXVZv4Y1VACTtR11UJCPHHudgY5i26Qj5TypE6DKlIApbwb5uqhXcJ5UUGbvZNRh7EeIoW+LrJumBsKp7w==
 
-abort-controller@3.0.0, abort-controller@^3.0.0:
+abort-controller@^3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/abort-controller/-/abort-controller-3.0.0.tgz#eaf54d53b62bae4138e809ca225c8439a6efb392"
   integrity sha512-h8lQ8tacZYnR3vNQTgibj+tODHI5/+l06Au2Pcriv/Gmet0eaj4TwWH41sO9wnHDiQsEj19q0drzdWdeAHtweg==
@@ -3332,7 +3332,7 @@ acorn-globals@^4.3.0:
     acorn "^6.0.1"
     acorn-walk "^6.0.1"
 
-acorn-jsx@5.2.0, acorn-jsx@^5.1.0:
+acorn-jsx@^5.1.0:
   version "5.2.0"
   resolved "https://registry.yarnpkg.com/acorn-jsx/-/acorn-jsx-5.2.0.tgz#4c66069173d6fdd68ed85239fc256226182b2ebe"
   integrity sha512-HiUX/+K2YpkpJ+SzBffkM/AQ2YE03S0U1kjTLVpoJdhZMOWy8qvXVN9JdLqv2QsaQ6MPYQIuNmwD8zOiYUofLQ==
@@ -11041,10 +11041,10 @@ jquery@3.5.1, jquery@^3.4.0:
   resolved "https://registry.yarnpkg.com/jquery/-/jquery-3.5.1.tgz#d7b4d08e1bfdb86ad2f1a3d039ea17304717abb5"
   integrity sha512-XwIBPqcMn57FxfT+Go5pzySnm4KWkT1Tv7gjrpT1srtf8Weynl6R273VJ5GjkRb51IzMp5nbaPjJXMWeju2MKg==
 
-js-base64@^2.5.1:
-  version "2.5.1"
-  resolved "https://registry.yarnpkg.com/js-base64/-/js-base64-2.5.1.tgz#1efa39ef2c5f7980bb1784ade4a8af2de3291121"
-  integrity sha512-M7kLczedRMYX4L8Mdh4MzyAMM9O5osx+4FcOQuTvr3A9F2D9S5JXheN0ewNbrvK2UatkTRhL5ejGmGSjNMiZuw==
+js-base64@^3.7.7:
+  version "3.7.7"
+  resolved "https://registry.yarnpkg.com/js-base64/-/js-base64-3.7.7.tgz#e51b84bf78fbf5702b9541e2cb7bfcb893b43e79"
+  integrity sha512-7rCnleh0z2CkXhH67J8K1Ytz0b2Y+yxTPL+/KOJoa20hfnVQ/3/T6W/KflYI4bRHRagNeXeU2bkNGI3v1oS/lw==
 
 js-combinatorics@0.5.x:
   version "0.5.4"
@@ -16426,10 +16426,6 @@ text-decoder@^1.1.0:
   dependencies:
     b4a "^1.6.4"
 
-text-encoding@0.x:
-  version "0.6.4"
-  resolved "https://registry.yarnpkg.com/text-encoding/-/text-encoding-0.6.4.tgz#e399a982257a276dae428bb92845cb71bdc26d19"
-
 text-table@^0.2.0:
   version "0.2.0"
   resolved "https://registry.yarnpkg.com/text-table/-/text-table-0.2.0.tgz#7f5ee823ae805207c00af2df4a84ec3fcfa570b4"
@@ -17100,11 +17096,6 @@ url-parse@^1.4.4, url-parse@^1.5.3:
     querystringify "^2.1.1"
     requires-port "^1.0.0"
 
-url-search-params-polyfill@2.x:
-  version "2.0.3"
-  resolved "https://registry.yarnpkg.com/url-search-params-polyfill/-/url-search-params-polyfill-2.0.3.tgz#466b451df7e707f9a0de601fa39b0a5816402dcd"
-  integrity sha512-DLQzhOippXPJOS+XJOwZGV5tILjGhIQEPbjEDAvTh5nWcZOpbGZG0xXj/lss+dAA1oC/8HYR5xFfC28TW0b+VQ==
-
 url@^0.11.3:
   version "0.11.4"
   resolved "https://registry.yarnpkg.com/url/-/url-0.11.4.tgz#adca77b3562d56b72746e76b330b7f27b6721f3c"
@@ -17975,7 +17966,7 @@ whatwg-encoding@^1.0.1, whatwg-encoding@^1.0.5:
   dependencies:
     iconv-lite "0.4.24"
 
-whatwg-fetch@2.0.4, whatwg-fetch@2.x:
+whatwg-fetch@2.0.4:
   version "2.0.4"
   resolved "https://registry.yarnpkg.com/whatwg-fetch/-/whatwg-fetch-2.0.4.tgz#dde6a5df315f9d39991aa17621853d720b85566f"
   integrity sha512-dcQ1GWpOD/eEQ97k66aiEVpNnapVj90/+R+SXTPYGHpYBBypfKJEQjLrvMZ7YXbKm21gXd4NcuxUTjiv1YtLng==