bypass-paywalls-firefox-clean/contentScript_once.js

//"use strict";

if (matchDomain('nationalgeographic.com')) {
  function natgeo_func(node) {
    removeDOMElement(node);
    let body = document.querySelector('body[class]');
    if (body) {
      body.removeAttribute('class');
      body.removeAttribute('style');
    }
  }
  waitDOMElement('div[id^="fittPortal"]', 'DIV', natgeo_func, false);
}

else if (matchDomain('nyteknik.se')) {
  window.setTimeout(function () {
    let hidden_images = document.querySelectorAll('img[src=""][data-proxy-image]');
    for (let hidden_image of hidden_images)
      hidden_image.setAttribute('src', hidden_image.getAttribute('data-proxy-image').replace('_320', '_640'));
  }, 2000); // Delay (in milliseconds)
}

function matchDomain(domains, hostname) {
  var matched_domain = false;
  if (!hostname)
    hostname = window.location.hostname;
  if (typeof domains === 'string')
    domains = [domains];
  domains.some(domain => (hostname === domain || hostname.endsWith('.' + domain)) && (matched_domain = domain));
  return matched_domain;
}

function removeDOMElement(...elements) {
  for (let element of elements) {
    if (element)
      element.remove();
  }
}

function waitDOMElement(selector, tagName = '', callback, multiple = false) {
  new window.MutationObserver(function (mutations) {
    for (let mutation of mutations) {
      for (let node of mutation.addedNodes) {
        if (!tagName || (node.tagName === tagName)) {
          if (node.matches(selector)) {
            callback(node);
            if (!multiple)
              this.disconnect();
          }
        }
      }
    }
  }).observe(document, {
    subtree: true,
    childList: true
  });
}