I am working on a custom addon in Odoo and I need to override a specific line in a core JavaScript file. The file I am referring to is located in the Odoo web client (start.js file) and contains the following code:

/** @odoo-module **/


import { makeEnv, startServices } from "./env";

import { legacySetupProm } from "./legacy/legacy_setup";

import { mapLegacyEnvToWowlEnv } from "./legacy/utils";

import { processTemplates } from "./core/assets";

import { session } from "@web/session";


const { mount, utils } = owl;

const { whenReady } = utils;


/**

* Function to start a webclient.

* It is used both in community and enterprise in main.js.

* It's meant to be webclient flexible so we can have a subclass of

* webclient in enterprise with added features.

*

* @param {owl.Component} Webclient

*/

export async function startWebClient(Webclient) {

    odoo.info = {

        db: session.db,

        server_version: session.db_version,

        server_version_info: session.server_version_info,

        isEnterprise: session.server_version_info.slice(-1)[0] === "e",

    };

    odoo.isReady = false;


    // setup environment

    const env = makeEnv();

    const [, templates] = await Promise.all([

        startServices(env),

        odoo.loadTemplatesPromise.then(processTemplates),

    ]);

    env.qweb.addTemplates(templates);


    // start web client

    await whenReady();

    const legacyEnv = await legacySetupProm;

    mapLegacyEnvToWowlEnv(legacyEnv, env);

    const root = await mount(Webclient, { env, target: document.body, position: "self" });

    // delete odoo.debug; // FIXME: some legacy code rely on this

    odoo.__WOWL_DEBUG__ = { root };

    odoo.isReady = true;


    // Update Favicons

    const favicon = `/web/image/res.company/${env.services.company.currentCompany.id}/favicon`;

    const icons = document.querySelectorAll("link[rel*='icon']");

    const msIcon = document.querySelector("meta[name='msapplication-TileImage']");

    for (const icon of icons) {

        icon.href = favicon;

    }

    if (msIcon) {

        msIcon.content = favicon;

    }

}

Specifically, I want to change the following line in my custom addon:
const favicon = /web/image/res.company/${env.services.company.currentCompany.id}/favicon;

to :
const favicon = (static path to a favicon.ico)

I understand that directly modifying core files is not recommended, so I am looking for a way to achieve this through a custom addon. Could someone guide me on how to properly override or extend this specific line in my custom addon?

Thank you in advance for your help!