Save canvas to image. Use it in browser console.

save_canvas_to_png.js

var clist = document.getElementsByClassName("inner_page");//change class name to yours or use other getElementXXX functions
var newTab = window.open('about:blank','canvase_to_image'); //need enable popup window for current site
for(ind=0;ind<clist.length;ind++){
  var dataURL = clist[ind].toDataURL("image/png");
  newTab.document.write("<img src='" + dataURL + "' alt='"+clist[ind].id+"'/><br/>");
}