Set Firefox view to 120% then run code in console.


// TrustedURL starting
let trustedURL;
if (window.trustedTypes && trustedTypes.createPolicy) {
    const policy = trustedTypes.createPolicy('myPolicy', {
        createScriptURL: (input) => input
    });
    trustedURL = policy.createScriptURL('https://cdnjs.cloudflare.com/ajax/libs/jspdf/1.5.3/jspdf.debug.js');
} else {
    trustedURL = 'https://cdnjs.cloudflare.com/ajax/libs/jspdf/1.5.3/jspdf.debug.js';
}

// Download script starting
let jspdf = document.createElement("script");

jspdf.onload = function () {
    

    // Initialize PDF with first size
    let pdf = new jsPDF('p', 'mm', 'a4');
    let elements = document.getElementsByTagName("img");

    for (let i = 0; i < elements.length; i++) {
        let img = elements[i];
        if (!/^blob:/.test(img.src)) {
            console.log("invalid src");
            continue;
        }

        let can = document.createElement('canvas');
        let con = can.getContext("2d");
        can.width = 1600;
        can.height = 2263;  

	con.drawImage(img, 0, 0);
        let imgData = can.toDataURL("image/jpeg", 1.0);

        // First 3 images: large custom size
        if (i < 3) {
            if (i !== 0) pdf.addPage('a4');
            pdf.setPage(pdf.getNumberOfPages()); // Go to the newly added A4 page
 	   // pdf.addImage(imgData, 'JPEG',0 , 0, 1200 * 0.17,  1200 * 1.414 *0.17);
		pdf.addImage(imgData, 'JPEG',0 , 0, 1200 * 0.17,  1200 * 1.414 * 0.17);

        }
        // Rest: A4
        else {
            pdf.addPage('a4');
            pdf.setPage(pdf.getNumberOfPages()); // Go to the newly added A4 page
 	    pdf.addImage(imgData, 'JPEG',0 , 0, 1200 * 0.17,  1200 * 1.414 * 0.17);
        }
    }


        let title = document.title.trim();

        // Remove ".pdf - Google Drive" if it exists
        title = title.replace(/\.pdf\s*-\s*Google Drive/i, "");

        // Replace any invalid filename characters
        let filename = title.replace(/[\\\/:*?"<>|]+/g, "_").trim() + ".pdf";

        pdf.save(filename);

};

jspdf.src = trustedURL;
document.body.appendChild(jspdf);