JavaScript for automate downloading images from familysearch.org
Open first page with book, that you want to download, like this:
Then open browser devtools(ctrl+shift+c) and press to console:
copy minified script version:
/*! Familysearch-downloader v1.0 | (c) palandovalex */
(()=>{async function e(e){const t=await fetch(e);if(!t.ok)throw new Error(t.status);console.log(t.type);const n=await t.blob(),o=new FileReader;return o.readAsDataURL(n),new Promise((e,t)=>{o.onloadend=(()=>{e(o.result)}),o.onerror=t})}var t=document.getElementsByClassName("next pager-icon fs-civ-circle-chevron-right enabled")[0],n=document.getElementsByClassName("actionToolbarSaveButton saveButton button save")[0];!function o(a){setTimeout(function(){let c=null;(c=a?async function(t){let n=t.getAttribute("href");var o=!1;do{try{o=await e(n)}catch({name:e,message:t}){let n=18e4;509==t&&(n*=21),await new Promise(e=>setTimeout(e,n))}}while(!o);const a=document.createElement("a");a.href=o,a.download="record_image",document.body.appendChild(a),a.click(),document.body.removeChild(a)}(n):async function(e){if(e.fireEvent)e.fireEvent("onclick");else{var t=document.createEvent("Events");t.initEvent("click",!0,!1),e.dispatchEvent(t)}}(t)).then(()=>{document.getElementsByClassName("next pager-icon fs-civ-circle-chevron-right enabled disabled")[0]||o(!a)})},8e3+Math.floor(8e3*Math.random()))}(!0)})();Paste it to console and press enter:
Now script started, and downloading your images.
`Warning! Periodicly you should reset page, again enter my script to console and start it. It needs to prevent overfilyng your RAM.