Remove all Facebook apps at once. Blogpost: https://lucahammer.com/2018/03/21/remove-facebook-apps-one-click/

remove_apps.js

// collect all links to remove the apps
var delete_links = document.querySelectorAll('#delete-link');

//click all collected links
for (var i = 0; i < delete_links.length; i++) {
    delete_links[i].click();
}

//wait five seconds for the confirmation boxes to load
//and click all confirmation boxes to remove the apps
setTimeout(function() {
    var confirm_links = document.querySelectorAll('.dialog_content [name=ok]');
    for (var i = 0; i < delete_links.length; i++) {
        confirm_links[i].click();
    }
}, 5000);