Is Voice Out: Text to Speech Voice Reader safe?

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function $t() {  var t, e = !1,    r;  this.ready = function() {    return Dt()  }, this.speak = function(s, a, n) {    a.rateAdjust = 1.1;    const i = Promise.resolve().then(function() {      return t && t[0] == s && t[1] == a ? t[2] : o(s, a.voice.lang)    });    r = W(i, a), r.startPromise.then(() => {      n({        type: "start",        charIndex: 0      }), e = !0    }).catch(function(c) {      n({        type: "error",        error: c      })    }), r.endPromise.then(() => n({      type: "end",      charIndex: s.length    }), c => n({      type: "error",      error: c    })).finally(() => e = !1)  }, this.isSpeaking = function(s) {    s(e)  }, this.pause = this.stop = function() {    r && r.pause()  }, this.resume = function() {    return r ? r.resume() : Promise.resolve()  }, this.prefetch = function(s, a) {    o(s, a.voice.lang).then(function(n) {      t = [s, a, n]    }).catch(console.error)  }, this.clearPrefetch = function() {    z(t), t = null  }, this.setNextStartTime = function() {}, this.getVoices = It;  function o(s, a) {    return H(s && a), Vt(s, a)  }}  function g() {    return tt(e.voice) ? qe : rt(e.voice) ? _e : Ne(e.voice) ? Pe : nt(e.voice) ? He : st(e.voice) ? we : me(e.voice) && !/\s(Hebrew|Telugu)$/.test(e.voice.voiceName) ? We : it(e.voice) ? Me : at(e.voice) ? Fe : ot(e.voice) ? Ge : ye(e.voice) ? we : pe(e.voice) ? new qt(ve, 16 * 1e3) : ve  }

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  async function getTexts(index, quietly) {    if (index < 0) {      if (index == -100) return (await getSelectedText()).split(paragraphSplitter);      else return null;    }    else {      return Promise.resolve(readAloudDoc.getTexts(index, quietly))        .then(function(texts) {          if (texts && Array.isArray(texts)) {            if (!quietly) consoleLog(texts.join("\n\n"));          }          return texts;        })    }  }  function getSelectedText() {    if (readAloudDoc.getSelectedText) return readAloudDoc.getSelectedText()    return window.getSelection().toString().trim();  }  this.getTexts = async function(index) {    if (index == 0) {      const math = await getMath()      try {        if (math) math.show()        return parse()      }      finally {        if (math) math.hide()      }    }    else return null;  }  this.getSelectedText = async function() {    const math = await getMath()    try {      if (math) math.show()      return window.getSelection().toString().trim()    }    finally {      if (math) math.hide()    }  }