How to use the @firebase/util.isBrowser function in @firebase/util

*
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
// Firebase Lite detection
// eslint-disable-next-line @typescript-eslint/no-explicit-any
if (util.isBrowser() && self.firebase !== undefined) {
    logger.warn("\n    Warning: Firebase is already defined in the global scope. Please make sure\n    Firebase library is only loaded once.\n  ");
    // eslint-disable-next-line
    var sdkVersion = self.firebase.SDK_VERSION;
    if (sdkVersion && sdkVersion.indexOf('LITE') >= 0) {
        logger.warn("\n    Warning: You are trying to load Firebase while using Firebase Performance standalone script.\n    You should load Firebase Performance with this instance of Firebase to avoid loading duplicate code.\n    ");
    }
}
var firebaseNamespace = createFirebaseNamespace();
var initializeApp = firebaseNamespace.initializeApp;
// TODO: This disable can be removed and the 'ignoreRestArgs' option added to
// the no-explicit-any rule when ESlint releases it.
// eslint-disable-next-line @typescript-eslint/no-explicit-any
firebaseNamespace.initializeApp = function () {
    var args = [];
    for (var _i = 0; _i < arguments.length; _i++) {
        args[_i] = arguments[_i];

*
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
// Firebase Lite detection
// eslint-disable-next-line @typescript-eslint/no-explicit-any
if (util.isBrowser() && self.firebase !== undefined) {
    logger.warn("\n    Warning: Firebase is already defined in the global scope. Please make sure\n    Firebase library is only loaded once.\n  ");
    // eslint-disable-next-line
    var sdkVersion = self.firebase.SDK_VERSION;
    if (sdkVersion && sdkVersion.indexOf('LITE') >= 0) {
        logger.warn("\n    Warning: You are trying to load Firebase while using Firebase Performance standalone script.\n    You should load Firebase Performance with this instance of Firebase to avoid loading duplicate code.\n    ");
    }
}
var initializeApp = firebase.initializeApp;
// TODO: This disable can be removed and the 'ignoreRestArgs' option added to
// the no-explicit-any rule when ESlint releases it.
// eslint-disable-next-line @typescript-eslint/no-explicit-any
firebase.initializeApp = function () {
    var args = [];
    for (var _i = 0; _i < arguments.length; _i++) {
        args[_i] = arguments[_i];
    }

*
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
// Firebase Lite detection
// eslint-disable-next-line @typescript-eslint/no-explicit-any
if (isBrowser() && self.firebase !== undefined) {
    logger.warn(`
    Warning: Firebase is already defined in the global scope. Please make sure
    Firebase library is only loaded once.
  `);
    // eslint-disable-next-line
    const sdkVersion = self.firebase.SDK_VERSION;
    if (sdkVersion && sdkVersion.indexOf('LITE') >= 0) {
        logger.warn(`
    Warning: You are trying to load Firebase while using Firebase Performance standalone script.
    You should load Firebase Performance with this instance of Firebase to avoid loading duplicate code.
    `);
    }
}
const firebaseNamespace = createFirebaseNamespace();
const initializeApp = firebaseNamespace.initializeApp;
// TODO: This disable can be removed and the 'ignoreRestArgs' option added to

*
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
// Firebase Lite detection
// eslint-disable-next-line @typescript-eslint/no-explicit-any
if (isBrowser() && self.firebase !== undefined) {
    logger.warn("\n    Warning: Firebase is already defined in the global scope. Please make sure\n    Firebase library is only loaded once.\n  ");
    // eslint-disable-next-line
    var sdkVersion = self.firebase.SDK_VERSION;
    if (sdkVersion && sdkVersion.indexOf('LITE') >= 0) {
        logger.warn("\n    Warning: You are trying to load Firebase while using Firebase Performance standalone script.\n    You should load Firebase Performance with this instance of Firebase to avoid loading duplicate code.\n    ");
    }
}
var initializeApp = firebase.initializeApp;
// TODO: This disable can be removed and the 'ignoreRestArgs' option added to
// the no-explicit-any rule when ESlint releases it.
// eslint-disable-next-line @typescript-eslint/no-explicit-any
firebase.initializeApp = function () {
    var args = [];
    for (var _i = 0; _i < arguments.length; _i++) {
        args[_i] = arguments[_i];
    }

*
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
// Firebase Lite detection
// eslint-disable-next-line @typescript-eslint/no-explicit-any
if (isBrowser() && self.firebase !== undefined) {
    logger.warn(`
    Warning: Firebase is already defined in the global scope. Please make sure
    Firebase library is only loaded once.
  `);
    // eslint-disable-next-line
    const sdkVersion = self.firebase.SDK_VERSION;
    if (sdkVersion && sdkVersion.indexOf('LITE') >= 0) {
        logger.warn(`
    Warning: You are trying to load Firebase while using Firebase Performance standalone script.
    You should load Firebase Performance with this instance of Firebase to avoid loading duplicate code.
    `);
    }
}
const initializeApp = firebase.initializeApp;
// TODO: This disable can be removed and the 'ignoreRestArgs' option added to
// the no-explicit-any rule when ESlint releases it.

*
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
// Firebase Lite detection
// eslint-disable-next-line @typescript-eslint/no-explicit-any
if (isBrowser() && self.firebase !== undefined) {
    logger.warn("\n    Warning: Firebase is already defined in the global scope. Please make sure\n    Firebase library is only loaded once.\n  ");
    // eslint-disable-next-line
    var sdkVersion = self.firebase.SDK_VERSION;
    if (sdkVersion && sdkVersion.indexOf('LITE') >= 0) {
        logger.warn("\n    Warning: You are trying to load Firebase while using Firebase Performance standalone script.\n    You should load Firebase Performance with this instance of Firebase to avoid loading duplicate code.\n    ");
    }
}
var firebaseNamespace = createFirebaseNamespace();
var initializeApp = firebaseNamespace.initializeApp;
// TODO: This disable can be removed and the 'ignoreRestArgs' option added to
// the no-explicit-any rule when ESlint releases it.
// eslint-disable-next-line @typescript-eslint/no-explicit-any
firebaseNamespace.initializeApp = function () {
    var args = [];
    for (var _i = 0; _i < arguments.length; _i++) {
        args[_i] = arguments[_i];