I am trying to create a small crawler as a chrome extension. How it works is: Open new window or tab. Perform a search for Google / Google News / YouTube with given keywords. Store information of the results in a small database

I first created and tested the functions with a popup.html. There it works perfectly.You click on a button and all pages are visited and the results are stored in a database. But I want to start the program without clicking anything first. That's why I migrated it to background.js. There it also works, but only if the Service Worker / DevTool console is open. Only then it runs completely.

I would be grateful for any helpful answer.

const keywords = [
    "Keyword1",
    "Keyword2",
    // ...
    "Keyword13"
];

chrome.runtime.onStartup.addListener(() => {
    chrome.tabs.onUpdated.addListener(loadingWindow);
    openWindow();
});

// Opens new Window or Tab with the correct URL
function openWindow() {
    chrome.tabs.onUpdated.addListener(loadingWindow);
    if (runs == 0) {
        chrome.windows.create({ url: getUrl(keywords[runs]), type: "normal" }, newWindow => {
            window_id = newWindow.id;
        });
    } else {
        chrome.tabs.update(tab_id, { url: getUrl(keywords[runs]) });
    }
}

// Wait to load the new tab
function loadingWindow(tabId, changeInfo, tab) {
    if (changeInfo.status === 'complete' && tab.status == 'complete' && tab.windowId == window_id) {
        tab_id = tabId;
        console.log(tab.windowId);
        chrome.tabs.onUpdated.removeListener(loadingWindow);
        chrome.tabs.sendMessage(tab.id, { text: source }, doStuffWithDom);
    }
};

// Get information from content script -> payload and then send to database
function doStuffWithDom(domContent) {
    let payload = {... }
    var data = new FormData();
    data.append("json", JSON.stringify(payload));
    fetch(".../store.php", { method: "POST", body: data });
    crawlDone();
}

// open new window / tab or close the open window
function crawlDone() {

    runs++;
    if (runs < keywords.length) {
        openWindow();
    } else if (runs == keywords.length) {
        chrome.windows.remove(window_id);
    }
};