function getInvoice() {
    return Array.from(document.getElementsByClassName("css-8tkdem")).map(row => {
        return Array.from(row.children).map(container => {
            return container.textContent;
        })
    });
}

browser.runtime.onMessage.addListener(function (message, sender, sendResponse) {
    if (message === "get") {
        sendResponse(getInvoice());
    }
});