remove-twitter-ads.js

const config = { childList: true, subtree: true };
const $target = document.querySelector('body');
const removeAds = () => {
    const selector = '[data-testid="placementTracking"]';
    document.querySelectorAll(selector).forEach(e => {
        console.log('Another ad bites the dust!');
        e.parentElement.removeChild(e);
    });
};
removeAds();
const observer = new MutationObserver(mutations => {
    for (let mutation of mutations) {
        if (mutation.type === 'childList') {
            if ([...mutation.addedNodes].length) {
                removeAds();
            }
        }
    }
});
observer.observe($target, config);