"Uncaught ReferenceError: getEventListeners is not defined"

i'm trying to remove Listeners. In console a code below is working. When i use code in Chrome extension i get: "Uncaught ReferenceError: getEventListeners is not defined". Why does this happen? Is there an equivalent to the function "getEventListeners"?

document.addEventListener('click', fireContentLoadedEvent, false);

function fireContentLoadedEvent () {
    console.log ("DOMContentLoaded");
    for (let i = 0; i < document.getElementsByClassName("someClass").length; i++) {
        plusButton = document.getElementsByClassName("someClass")[i]

        if ( getEventListeners(plusButton)["click"].length > 1) {

            plusButton.removeEventListener("click", getEventListeners(plusButton).click[1].listener);

        }
    }
}