Is MathSolver safe?

class LingappsConfig {  constructor() {    this.baseUrl = "https://services.lingapps.dk";    this.application = "cas";    this.licenseName = "casLicense";    this.googleAnalyticsTrackingId = "UA-79284543-25";  }}

const Events = {  SessionLoggedIn: () => new GoogleAnalyticsEvent("Session", "Logged in"),  MathCalculate: () => new GoogleAnalyticsEvent("Math", "Calculate"),  MathSolve: () => new GoogleAnalyticsEvent("Math", "Solve"),  MathParseGoogleLatex: () => new GoogleAnalyticsEvent("Math", "Parse Google Latex"),  MathLatexToImage: () => new GoogleAnalyticsEvent("Math", "Latex to image"),  UserClickTriangleCalculator: () => new GoogleAnalyticsEvent("User click", "Triangle calculator"),  UserClickInsertUnit: (value) => new GoogleAnalyticsEvent("User click", "Insert unit", value),  UserClickInsertSymbol: (value) => new GoogleAnalyticsEvent("User click", "Insert symbol", value)};

class GoogleAnalyticsClient {  constructor(userService, config) {    this._userService = userService;    this._config = config;  }  async _send(category, action, label, value) {    const session = await this._userService.getSession();    const identifier = session      ? await async function hashEmail(email) {          const encoded = new TextEncoder().encode(email);          const digest = await crypto.subtle.digest("SHA-256", encoded);          return Array.from(new Uint8Array(digest))            .map(byte => byte.toString(16).padStart(2, "0"))            .join("");        }(session.user.email)      : "NO_SESSION";    const body = {      v: 1,      tid: this._config.googleAnalyticsTrackingId,      t: "event",      uid: identifier,      cid: identifier,      an: "MathSolver",      aid: chrome.runtime.id,      av: chrome.runtime.getManifest().version,      ec: category,      ea: action    };    if (label !== undefined) {      body.el = label;    }    if (value !== undefined) {      body.ev = value;    }    const encodedBody = Object.entries(body)      .map(([key, entryValue]) => encodeURIComponent(key) + "=" + encodeURIComponent(entryValue))      .join("&");    try {      await fetch("https://www.google-analytics.com/collect", {        method: "POST",        body: encodedBody      });    } catch (error) {    }  }  async send(event) {    await this._send(event.category, event.action, event.label, 1);  }}

class GoogleAnalyticsMiddleware {  constructor(googleAnalyticsService) {    this._googleAnalyticsService = googleAnalyticsService;  }  async onRequest(request) {    if (request.url.includes("/cas/calculate")) {      this._googleAnalyticsService.send(Events.MathCalculate());    } else if (request.url.includes("/cas/solve")) {      this._googleAnalyticsService.send(Events.MathSolve());    } else if (request.url.includes("/cas/parseGLatex")) {      this._googleAnalyticsService.send(Events.MathParseGoogleLatex());    } else if (request.url.includes("/cas/latexToImage")) {      this._googleAnalyticsService.send(Events.MathLatexToImage());    }    return request;  }  async onResponse(response) {    return response;  }  async onError(error) {  }}