Uncaught TypeError: can't access property?

Question

JavaScript

Hello. There is an extension for chrome that works fine, but in firefox it shows an error. Help solve the problem.
Uncaught TypeError: can't access property "addEventListener", chrome.extension.onMessage is undefined

background.js

var websocket,
    ws = "link",
    player = document.createElement("audio");

function connect(e) {
    void 0 === websocket &&
        (((websocket = new WebSocket(e)).onopen = function() {}),
            (websocket.onmessage = function(e) {
                var o = JSON.parse(e.data);
                chrome.storage.local.get("title", function(e) {
                        if (e.title !== o.now_playing.song.title) {
                            if (!player.paused)
                                o.now_playing.song.title, o.now_playing.song.artist;
                            chrome.storage.local.set({
                                    artwork: o.now_playing.song.art,
                                }),
                                chrome.storage.local.set({
                                    title: o.now_playing.song.title,
                                }),
                                chrome.storage.local.set({
                                    artist: o.now_playing.song.artist,
                                });
                        }
                    }),
                    "" === player.src && (player.src = o.station.listen_url),
                    chrome.runtime.sendMessage({
                        message: "radio_fetched",
                        data: o.now_playing.song,
                    });
            }),
            (websocket.onclose = function() {
                websocket = void 0;
            }));
}

function closeWebSocketConnection() {
    (null == websocket && null == websocket) ||
    (websocket.close(), (websocket = void 0));
}
chrome.extension.onMessage.addEventListener(function(e) {
    "load" === e.action &&
        (connect(ws),
            chrome.runtime.sendMessage({
                message: "player",
                data: {
                    status: player.paused,
                    volume: player.volume,
                },
            })),
        "play" === e.action &&
        (player.paused ?
            player.play() :
            (player.pause(), closeWebSocketConnection())),
        "volume" === e.action && (player.volume = e.data / 100);
});

popup.js

window.onload = function (e) {
  chrome.storage.local.get('artwork', (e) => {
    void 0 !== e.artwork && (document.getElementById('artwork').src = e.artwork);
  }), chrome.storage.local.get('title', (e) => {
    void 0 !== e.title && (document.getElementById('title').innerHTML = e.title);
  }), chrome.storage.local.get('artist', (e) => {
    void 0 !== e.artist && (document.getElementById('artist').innerHTML = e.artist);
  }), chrome.extension.sendMessage({
    action: 'load',
  }), document.getElementById('play').addEventListener('click', () => {
    e.preventDefault(), document.getElementById('play').classList.toggle('paused'), chrome.extension.sendMessage({
      action: 'play',
    });
  }), document.getElementById('volume').addEventListener('change', function () {
    chrome.extension.sendMessage({
      action: 'volume',
      data: this.value,
    });
  });
}, chrome.runtime.onMessage.addEventListener((e, t, n) => {
  e.message === 'radio_fetched' && (document.getElementById('artwork').src = e.data.art, document.getElementById('title').innerHTML = e.data.title, document.getElementById('artist').innerHTML = e.data.artist), e.message === 'player' && (!1 === e.data.status && document.getElementById('play').classList.add('paused'), document.getElementById('volume').value = 30 * e.data.volume);
});